146 Sentences With "occulting" | Random Sentence Generator

The Las Cumbres observations show that the occulting material, whatever is blocking the star light, preferentially absorbs blue light.

Inhabited worlds or alien robot swarms would presumably be opaque, blocking all light, so they are unlikely to be the occulting structures.

Solar eclipses, like the one that mesmerized the nation last month, are examples of the moon occulting the sun (but with far more risk to your eyes).

These observations showed that some wavelengths of light were blocked at different levels than others, which suggests that the structures occulting KIC 8462852 are transparent enough to let select bands of light pass through.

Located on the harbour breakwaters of Büsum are two other lights. On the west mole is a 9-metre high red tower which displays an occulting red light. The east mole has a similar tower, painted green that displays an occulting green light.

The white occulting light flashes every six seconds, and it can be seen for about .

The light is white, red or green (depending on direction) occulting twice every 8 seconds.

It flashes white, red, or green light (depending on direction), occulting once every six seconds.

In 1884 the High light was upgraded and its occulting characteristic was altered to two two-second eclipses every minute.

The light emits a white, red or green light depending on direction, occulting in groups of two every eight seconds.

A debris disk around the star AU Microscopii. The black circle in the center is an occulting disk of a coronagraph. An occulting disk is a small disk used in a telescope to block the view of a bright object in order to allow observation of a fainter one. The coronagraph, at its simplest, is an occulting disk in the focal plane of a telescope, or in front of the entrance aperture, that blocks out the image of the solar disk, so that the corona can be seen.

A new tower high was erected in 1903 and using the available optic and an occulting mechanism imported from England; the light was converted from fixed to occulting. Further modifications were done in 1924 by converting the light to a flashing one using acetylene gas flasher. The light was converted to LED flashing light using solar energy in 2008.

The light characteristic shown is a green occulting light with a cycle of three seconds (Oc.G. 3s), the same as Bradleys Head Light.

A secondary light is located at an elevation of above sea level and that emits a red light, occulting in groups of two.

The light tower is tall. The occulting light has a 6-second cycle, emitting a 26,100-candela light. The light can be seen for about .

At the top of the tower, there is a white, red, or green light (depending on direction) that is occulting three times every 10 seconds.

The new lighthouse is tall and can be seen for up to . It has an occulting light that blinks white, red, and green over an eight-second period.

The lighthouse is painted white and the lantern on top is red. The lighthouse shines white, red, or green light depending on direction, occulting twice every 8 seconds.

Like a flashing light, it can be used for a single occulting light that exhibits only a single period of darkness or the periods of darkness can be grouped and repeated at regular intervals (abbreviated "Oc"), a group (Oc(3)) or a composite group (Oc(2+1)). The term occulting is used because originally the effect was obtained by a mechanism (e.g. a vertical or rotating shutter) periodically shading the light from view.

As the source is occulting behind the moon ( viz. passing behind), Fresnel style diffraction patterns are produced which can be detected by very large radio telescopes and the exact locations calculated.

The occulting mechanism was clockwork. A petroleum vapour lamp was introduced in the early 20th century; the triple-occulting arrangement remained in place until 1936. In 1936 the light was electrified: it was given a 100 volt, 1500 watt bulb set within an eight-sided revolving Fresnel lens array, which displayed a white flash every three seconds with a range of . Withernsea was the first lighthouse in the North of England to be converted from oil to electricity.

Once the lightcurve has been recorded the chord across the occulting object can be determined via calculation. By using the start and end times of the occultation event the position in space of both the observer and the occulting object can be worked out (a process complicated by the fact that both the object and the observer are moving). Knowing these two locations, combined with the direction to the background object, the two endpoints of the chord can be determined using simple geometry.

The light sits at an elevation of above sea level. The light emits a white, red or green light, depending on direction, occulting twice every 8 seconds. The light can be seen for up to .

The light in the lantern flashes white every 20 seconds. There is a secondary light located lower in elevation that flashes white, red or green light depending on direction, occulting three times every 10 seconds.

The light sits on top of the tower at an elevation of and it emits a white, red, or green light (depending on direction), occulting once every six seconds. The light can be seen for about .

Before the lighthouse was erected, the island was uninhabited and saw no formal use. The tower utilized an occulting light which lit for five seconds and eclipsed for five seconds. It stood 47 feet above the water.

The occulting light on top flashes red, white, or green depending on the direction from which it is viewed. The 55,800-candela light can be seen for up to . The light tower is white with a red top.

It has a white, red, or green light (depending on direction) that is occulting twice every 7.5 seconds. The lighthouse is painted white and the lantern roof is red. The light sits at an elevation of above sea level.

The orbit of 7 Iris compared with the orbits of Earth, Mars and Jupiter Iris was observed occulting a star on May 26, 1995, and later on July 25, 1997. Both observations gave a diameter of about 200 km.

The light can be seen for up to and it emits a white, red, or green light, depending on direction, occulting twice every 8 seconds. The keeper's house is available for overnight accommodations, but the tower is closed to the public.

The burners were switched on and off by clockwork, to preserve the occulting characteristic (the gas being cut off for three seconds every half-minute). The red and white sectors had a range of 13 and 14.5 nautical miles respectively.

By comparison, the MIPS photometer on the Spitzer Space Telescope gives a diameter of 145.44 ± 7.72 km and a geometric albedo of 0.03 ± 0.01. When the asteroid was observed occulting a star, the results showed a diameter of 148.00 ± 16.26 km.

This method was developed in the 1820s by the German mathematician and astronomer, Friedrich Wilhelm Bessel, and later improved by William Chauvenet. The basic concept is that Besselian elements describe the movement of the shadow cast by the occulting body – for solar eclipses this is the shadow of the Moon – on a specifically chosen plane, called the fundamental plane. This is the geocentric, normal plane of the shadow axis. In other words, it is the plane through the Earth's center that is perpendicular to the line through the centers of the occulting and the occulted bodies.

Cetus is not among the 12 true zodiac constellations in the J2000 epoch, nor classical 12-part zodiac. The ecliptic passes less than 0.25° from one of its corners. Thus the moon and planets will enter Cetus (occulting any stars as a foreground object) in 50% of their successive orbits briefly and the southern part of the sun appears in Cetus for about one day each year. Many asteroids in belts have longer phases occulting the north-western part of Cetus, that bulk with a slightly greater inclination to the ecliptic than the moon and planets.

The light sits at an elevation of above sea level and it emits a white, red, or green light (depending on direction), occulting once every six seconds. The light can be seen for up to . The site is only accessible by boat.

The lighthouse is mounted on a rock and connected to the shore by a footbridge. The light characteristic shown is a green occulting light with a cycle of three seconds (Oc.G. 3s), the same as Robertson Point Light. Listed as "Bradley, head".

The white, red, or green light (depending on direction), occulting once every 6 seconds. There is a fresnel lens that has been in use since 1906. It can be seen for up to . The lighthouse is lit every year from July 21 until May 16.

The lighthouse is equipped with a fourteen-day battery backup to keep the emergency light working. It was modernized in 1988 when mains power was installed. The lighthouse emits a white occulting light every 8 seconds and was automated in 1962.Ornsay Northern Lighthouse Board.

When electricity was brought to Burnham in 1927 a 1000-watt incandescent light bulb was installed in each lighthouse (replacing the paraffin vapour burners then in use) which rendered the keepers redundant. A submarine cable was laid between the two lighthouses and the characteristics of the two lights were synchronised (being controlled by a 'motor driven character machine' installed in the High lighthouse, which controlled both light circuits together). Both lights were given an occulting characteristic, the Low light occulting every 2.5 seconds, the High light every 5 seconds. In each location the lamp was set within a sectional fixed optic, backed by a dioptric mirror.

Centaurus X-3 is located in the galactic plane about 5.7 kiloparsecs away, towards the direction of the Carina–Sagittarius Arm, and is a member of an occulting spectroscopic binary system. The visible component is Krzeminski's Star, a supergiant; the X-ray component is a rotating, magnetized neutron star.

When the asteroid was observed occulting a star, the results showed a diameter of 176.7 ± 0.4 km. Photometric observations of this asteroid collected during 2004–2005 show a rotation period of 16.26 ± 0.02 hours with a brightness variation of 0.08 ± 0.02 magnitude. One of Saturn's satellites is also named Dione.

The lighthouse is square and of concrete construction, standing tall. The light is located on top of the tall tower, sitting at an elevation of about . The white, red or green light (depending on direction) emits an occulting light once every 6 seconds. The lighthouse also emits a racon signal "T".

The light was automated in 1979. Today, the lighthouse displays an occulting red light with a four-second period, having a nominal range of 12 nautical miles. During the navigation season that runs from April 1 to November 1, the fog signal sounds a two-second blast every fifteen seconds.

In Britain, the Whidbey Automatic Light (Occulting Green) was constructed at the eastern end of Plymouth Sound in 1980. In what is now South Australia, Matthew Flinders in February 1802 named the following geographical features "after my worthy friend, the former master-attendant at Sheerness" – the Whidbey Isles and Point Whidbey.

In 1883 Hunstanton Lighthouse was altered to display a group occulting light (the lamp being eclipsed twice for two seconds apiece, every thirty seconds).London Gazette, Issue 25243, Page 3154, 19 June 1883. In 1897 the tower was repainted red, with a broad white stripe.London Gazette, Issue 26863, Page 3389, 18 June 1897.

The Vieille's beam has undergone several changes over its history. First lit on 15 September 1887, it had white, red and green sectors, with a 50 cm mirror. At the same time, the twin lights of Pointe du Raz were extinguished. In 1898, the lighthouse was equipped with a 5-second occulting light.

Bradleys Point Light Tower is located on the point of Bradley's Head Peninsula and used as a navigation marker and warning light to ships entering and leaving the harbour. It is constructed of timber and concrete. The lighthouse design is similar to 1934 design at Robertson's Point. It displays occulting green light.

Transit of mercury chord across the sun In the field of astronomy the term chord typically refers to a line crossing an object which is formed during an occultation event. By taking accurate measurements of the start and end times of the event, in conjunction with the known location of the observer and the object's orbit, the length of the chord can be determined giving an indication of the size of the occulting object. By combining observations made from several different locations, multiple chords crossing the occulting object can be determined giving a more accurate shape and size model. This technique of using multiple observers during the same event has been used to derive more sophisticated shape models for asteroids, whose shape can be highly irregular.

Geita Lighthouse () is a coastal lighthouse located in Askvoll Municipality in Vestland county, Norway. It was first lit in 1897 and it was automated from 1980-1982\. It was listed as a protected site in 1999. The tall tower emits a white, red, or green light, depending on direction, occulting once every 6 seconds.

The present lighthouse is tall. The white structure has a red roof and sits atop a square, black, metal frame. The light sits at an elevation of above sea level and it emits a white, red, or green light (depending on direction), occulting twice every 9 seconds. The light can be seen for up to .

The light emits a white, red, or green light (depending on direction) occulting once every 6 seconds. The red light can be seen for up to , the green light can be seen for up to , and the white light can be seen for up to . Each light can only be seen from certain directions.

The white tower has a red top with a light that sits at an elevation of above sea level. The light flashes in white, red, and green (depending on direction) and it is occulting once every six seconds. The 33,300-candela light can be seen for up to . The site is only accessible by boat.

Lighted buoys either flash Morse code "A" (di- dah), or one long flash, occulting (more light than dark) or isophase (equal light and dark), every 10 seconds (L Fl 10s).Haire, Penny.Yachtmaster. Royal Yachting Association, 2009, p. 61. In the United States, safe water marks have the initials of their associated waterways or localities printed on them.

The lighthouse was first lit in 1916, automated in 1986, and has not had an on-site lighthouse keeper since 2006. The light on top of the tall tower flashes a white, red, or green light depending on direction, occulting once every six seconds. The light intensity is 35,600 candela and the light can be seen for up to .

The last 'sixty-miler' to be wrecked there was the s.s. Munmorah, which ran aground on the reef in 1949. The Court of Marine Inquiry into the loss of the Munmorah was not satisfied that the occulting light was on at the time of the stranding. The reef also claimed a number of ships on interstate runs.

In 1934, a new lighthouse was constructed right in front of the older tower. The new tower is tall and is painted white with a red top. The light sits on top at an elevation of above sea level. The light emits a white, red, or green light (depending on direction), occulting three times every 10 seconds.

It was listed as a protected site in 1999. The light burns year-round except between 2 May and 4 August each year when it is unnecessary due to the midnight sun. The light is located at an elevation of above sea level. The light is white, red, or green depending on direction, occulting twice every 8 seconds.

The tall lighthouse is a red cast iron tower on a white granite stonemasonry base. This is the second tallest lighthouse tower in Norway. The lighthouse's range is , and the white, red, or green light, depending on direction, is occulting every eight seconds. The islet is barren rock with just the lighthouse tower, a concrete boathouse, and two wharves.

The lighthouse was built in 1985 to replace the previous tower that was built in 1921. The tall tower is painted white with a black horizontal stripe and a red roof. The light sits at an elevation of above sea level. The tower emits a white, red, or green light (depending on direction), occulting twice every 8 seconds.

Long-slit spectroscopy can ameliorate problems with contrast when observing structures near a very luminous source. The structure in question can be observed through a slit, thus occulting the luminous source and allowing a greater signal-to-noise ratio. An example of this application would be the observation of the kinematics of Herbig-Haro objects around their parent star.

The recording of the lightcurve continues during and for a short time after the predicted event. This extra recording time is due in part to uncertainties in the occulting objects orbit but also due to the possibility of detecting other objects orbiting the primary object (for example in the case of a binary asteroid, also the ring system around the planet Uranus was detected this way). The exact method of lightcurve determination is dependent on the specific equipment available to the observer and the goals of the observation, however in all occultation events accurate timing is an essential component of the observation process. The exact time that the foreground object eclipses the other can be used to work out a very precise position along the occulting object's orbit.

Coquet Island Lighthouse. An occulting light is a rhythmic light in which the duration of light in each period is longer than the total duration of darkness. In other words, it is the opposite to a flashing light where the total duration of darkness is longer than the duration of light. It has the appearance of flashing off, rather than flashing on.

Measurements made with the IRAS observatory give a diameter of 91.58 ± 4.14 km and a geometric albedo of 0.19 ± 0.02. By comparison, the MIPS photometer on the Spitzer Space Telescope gives a diameter of 88.30 ± 8.51 km and a geometric albedo of 0.20 ± 0.04. When the asteroid was observed occulting a star, the results showed a diameter of 89.1 ± 1.1 km.

Aegle has been observed occulting stars several times. On 5 January 2010, it occulted the star as seen from Ibaraki, Japan, and allowed to determine a cross-section of kilometers. In New Zealand, on 18 February 2002, it occulted the star in the constellation of Centaurus for approximately 12.7 seconds during which a drop of 2.1 in magnitude was to be expected.

Arethusa (minor planet designation: 95 Arethusa) is a large main-belt asteroid. Its coloring is dark, its composition carbonaceous and primitive. It was discovered by Robert Luther on 23 November 1867, and named after one of the various Arethusas in Greek mythology. Arethusa has been observed occulting a star three times: first on 2 February 1998, and twice in January 2003.

It was first built in 1895 and it was automated in 1980. The red tall wood tower is attached to the seaward end of a 1-1/2 story wood lighthouse keeper's house. The light sits at an elevation of about above sea level. The occulting light emits a white, red, or green light (depending on direction) once every six seconds.

The orbit of this asteroid has close to a 2:1 commensurability with the orbit of Jupiter. On 17 January 2000, this minor planet was observed occulting a 9th magnitude star from seven locations. These timed chords across the silhouette allowed an estimate to be made of the object's dimensions, yielding a cross-section of . Pales has been studied by radar.

The tall lighthouse was first lit in 1914. In 1985, the old lighthouse was closed and a new automated, electric fiberglass light was installed near the old tower. The light sits at an elevation of above sea level. The 25,400-candela light is white, red, or green light depending on the viewing direction and it is occulting once every 6 seconds.

Subsequently, these were replaced by a small revolving optic, mounted on an AGA PRB gearless drive. Coquet's light has been solar powered since 2008. The original 1841–1851 optic is now on public display, along with the old occulting apparatus, at Souter Lighthouse, further down the coast. They had previously been part of the Trinity House National Lighthouse Museum collection.

The light sits at an elevation of above sea level. The 3,370,000-candela light can be seen for about . There is also a secondary light up the lighthouse tower. The top light emits three white flashes every 40 seconds and the second light emits a white, red, or green (depending on direction) that is occulting three times every 10 seconds.

One of its observations was of Comet Encke. The Sheepshanks was used to observe the moon occulting stars in 1905. Some of the stars that were observed include Bradley 687, 130 Tauri, and 26 Geminorum- among others. In addition to the occultation of stars by the Moon, the Sheepshanks equatorial is also reported to have been used to observe the moons of Jupiter.

V718 Persei is a young star in the constellation of Perseus, located in the young open cluster IC 348. The star has several designations derived from the cluster in which it belongs (H 187, TJ 108, HMW 15, LRL 35, NTC 5401, LNB 90—all require the prefix "IC 348"). The star shows hints of an occulting body of unclear nature, likely planetary.

The 2MASX J00482185−2507365 occulting pair is a pair of overlapping spiral galaxies found in the vicinity of NGC 253, the Sculptor Galaxy. Both galaxies are more distant than NGC 253, with the background galaxy, 2MASX J00482185−2507365 (PGC 198197), lying at redshift z=0.06, about 800 million light-years from Earth, and the foreground galaxy lying between NGC 253 and the background galaxy (0.0008 < z < 0.06).arXiv:0810.2646v1 ; "An extended dust disk in a spiral galaxy; An occulting galaxy pair in ANGST" ; ; B. W. Holwerda, W. C. Keel, B. Williams, J. J. Dalcanton, R. S. de Jong ; 15 Oct 2008 This pair of galaxies illuminates the distribution of galactic dust beyond the visible arms of a spiral galaxy. The heretofore unexpected extent of dust beyond the starry limits of the arms shows new areas for extragalactic astronomical study.

When electricity was brought to Burnham in 1927 a 1000-watt incandescent light bulb was installed in each lighthouse (replacing the paraffin vapour burners then in use) which rendered the keepers redundant. (Burnham was the first Trinity House lighthouse in England to be converted from manned to unmanned automatic operation, following the automation of their lighthouses at Trwyn Du and St Tudwal's Island in Wales five years earlier.) A submarine cable was laid between the two lighthouses and the characteristics of the two lights were synchronised (being controlled by a 'motor driven character machine' installed in the High lighthouse, which controlled both light circuits together). Both lights were given an occulting characteristic, the Low light occulting every 2.5 seconds, the High light every 5 seconds. In each location the lamp was set within a sectional fixed optic, backed by a dioptric mirror.

National Park Service, National Maritime Heritage Program, Inventory of Historic Lights, Manistee North Pier. National Register of Historic Places, Reference # 90000718 The tower is capped with a ten-sided steel lantern. The light uses a 5,000 candlepower incandescent electric bulb, and has a flashing mechanism which displays "a group occulting white light" over 30 seconds. Its focal plane is , and is visible for in clear weather.

In 1879 a larger (32 cwt) bell was installed, and the old bell was transferred to Gunfleet Lighthouse. (The new bell had previously been in use at Start Point lighthouse, where a fog siren had replaced it two years earlier). The bell sounded four strokes every minute in foggy weather. The following year, the light was made occulting (being eclipsed for three seconds every half minute).

New condensing prisms were fitted in 1908. During World War II it was used by the army as a communications base and observations post, and was therefore placed under guard. In 1944 the clockwork mechanism controlling the occulting of the light was replaced, as the original was considered on the verge of failure. In 1955 the lighthouse was electrified, at a cost of £1300.

To-scale diagram of the planet's orbit. The gray line indicates the transit window. Careful radial velocity measurements have made it possible to detect the Rossiter–McLaughlin effect, the shifting in photospheric spectral lines caused by the planet occulting a part of the rotating stellar surface. This effect allows the measurement of the angle between the planet's orbital plane and the equatorial plane of the star.

The current light was built in 1977, although the lighthouse station was established 1855. The light sits atop a tall concrete post and emits its light above sea level. The white, red, or green light (depending on direction) is an occulting light which flashes off once every 6 seconds at an intensity of 4,500 candela. The lighthouse is painted white and the lantern roof is painted red.

Its orbit has an eccentricity of 0.21 and an inclination of 12° with respect to the ecliptic. The body's observation arc begins with the first recorded observation by the MPC at Vienna Observatory on 10 September 1885, or more than 9 years after its official discovery observation at Clinton. On 19 October 2005, it was observed occulting the prominent star Regulus from Vibo Valentia, Italy.

The orbit of 15 Eunomia places it in a 7:16 mean-motion resonance with the planet Mars. Eunomia is used by the Minor Planet Center to calculate perturbations. The computed Lyapunov time for this asteroid is 25,000 years, indicating that it occupies a chaotic orbit that will change randomly over time because of gravitational perturbations of the planets. Eunomia has been observed occulting stars three times.

The present light sits on top of a tall on top of a concrete pillar. The occulting light flashes red or white (depending on the direction) once every six seconds. The light sits at an elevation of above sea level and it can be seen for up to . The tower is painted white with one black horizontal band and the roof on the light is red.

During World War II, air raids damaged some of the buildings at this station. The tall, round, cast iron lighthouse is red with one white stripe and it can be seen for up to . The light sits on top at an elevation of above sea level. The 140,400-candela light emits a white, red, or green light (depending on direction), occulting once every six seconds.

Knowing this chord and the foreground object's size, a more precise orbit for the object can be determined. This usage of the term "chord" is similar to the geometric concept (see: Chord (geometry)). The difference being that in the geometric sense a chord refers to a line segment whose ends lie on a circle, whereas in the astronomical sense the occulting shape is not necessarily circular.

Bellambi was a busy ocean jetty port with a dangerous reef. At least four 'sixty-milers' came to grief there. The 'sixty-milers' wrecked on the reef at Bellambi include Llewellyn (1882), Adinga (1896) and Saxonia (1898). In 1913, an occulting light visible for eight miles to sea was erected, on a steel tower on Bellambi Point, to guide ships away from the dangerous reef.

It was first lit in 1870 and automated in 1985. The lighthouse is owned by the Norwegian Coastal Administration, and is used as cultural cafe and lodging house. The tall, slender, round, cylindrical, concrete tower is painted white and the lantern roof is red. The light can be seen for up to , and it emits a white, red, or green light, depending on direction, occulting three times every 10 seconds.

Fierce tides limited the period in which building work could take place to less than half of each year. After five years, construction was complete and its beam first shone in 1887. The light is occulting, with a range of ; a foghorn was installed in the early twentieth century. La Vieille achieved notoriety in the 1920s when two disabled war veterans were stranded there for weeks by storms, their health deteriorating.

So far Ampella has been observed occulting a star once, on November 8, 1991, from New South Wales, Australia. This asteroid has been resolved by the W. M. Keck Observatory, resulting in a size estimate of 53 km. It is oblate in shape, with a size ratio of 1.22 between the major and minor axes. Measurements from the IRAS observatory gave a similar size estimate of 57 km.

The lighthouse was automated in 1976. The light sits at an elevation of above sea level and it emits a white, red, or green light (depending on direction) occulting in groups of three every 10 seconds. The light burns from 16 July until 21 May every year, but it does not burn in the summer due to the midnight sun. The lighthouse is painted white with a red top.

Long Point Light Station is an historic lighthouse at the northeast tip of Long Point in Provincetown, Massachusetts. As a navigational aid, it marks the southwest edge of the entrance to Provincetown Harbor. The United States Coast Guard Light List describes it simply as a "white square tower". The light it casts is green, occulting every 4 seconds, and, at a focal height of above mean sea level, has a visible range of .

Umbra, penumbra, and antumbra formed through windows and shutters The umbra (Latin for "shadow") is the innermost and darkest part of a shadow, where the light source is completely blocked by the occulting body. An observer within the umbra experiences a total eclipse. The umbra of a round body occluding a round light source forms a right circular cone. As viewed from the cone's apex, the two bodies appear the same size.

The small 'Stone Fleet' steamer Resolute was merely passing Bellambi, in 1907, when it became stranded on the reef and broke up. It was not until 1913, that an electrically-powered occulting light—visible up to 12.9 km to sea—was erected on Bellambi Point to aid shipping. A number of 'sixty-milers' came to grief there. The 'sixty-milers' wrecked on the reef at Bellambi include, Llewellyn (1882), Adinga (1896) and Saxonia (1898).

These open coal fire lights were difficult to maintain and were soon replaced by a single oil- powered light within a cast-iron lantern. In 1860, the oil-powered light was upgraded to a dioptric light and the Mumbles Battery, a fort that surrounds the tower, was built by the War Department. In 1905, an occulting mechanism, where the light was made to flash, was fitted. This was partially automated in 1934.

An additional upgrade was made in 1875 when the lamp was switched out for a four-wick mineral oil burner. In 1894, the lighthouse was further altered to increase the amount of light emitted. The four-wick burner was exchanged for a Douglass burner with eight wicks and the lantern was improved; the power of the light was thereby increased to 35,000 candela. The characteristic of the light changed from fixed to occulting.

At first the lantern was equipped with a catoptrics system replaced in 1886 by a 2nd order of Fresnel lens built by Barbier and Fenestre. The lighthouse was painted in red, then in dark red and at last with black and white horizontal bands. The lantern emits a white occulting light (Oc (6) W 21 seconds) visible up to . The lighthouse is managed by Brazilian Navy and is identified by the country code number BR-4008.

The lighthouse is a surprising distance (nearly ) from the sea front. At the time it was built, there was nothing between it and the sea but sand dunes, and fear of coastal erosion led to it being positioned well back. Originally, the lantern contained an eight-wick paraffin lamp within a fixed Fresnel lens optic; it was an occulting light, the lamp being eclipsed three times in quick succession every minute.London Gazette, Issue 26487, Page 1091, 20 February 1894.

The planet's orbit is probably circular (within one standard deviation of error). Careful radial velocity measurements have made it possible to detect the Rossiter–McLaughlin effect, the shifting in photospheric spectral lines caused by the planet occulting a part of the rotating stellar surface. This effect allows the measurement of the angle between the planet's orbital plane and the equatorial plane of the star. In the case of HD 149026 b, the alignment was measured to be +11°.

The Low light was visible for , and as such the two lights in line also served to provide a safe line of approach for vessels navigating up the Bristol Channel from the direction of Foreland Point and Minehead. South of this line the High light was 'masked'. In contrast to the fixed light of the Low lighthouse, the High lighthouse displayed an 'intermittent' (i.e. occulting) light (being bright for three-and-a-half minutes, then obscured for thirty seconds).

Later a second sector light was added, pointing south from a lower window in the tower. By the 1890s the main light was made occulting. In 1976 the light was electrified and 1990 the lighthouse was automated, at which point a revolving array of quartz halogen sealed beam lamps were installed in place of the old optic,Photo, 1990. with columns of lamps grouped in threes on a rotating pedestal, so as to display three flashes every 30 seconds.

While the lighthouse was completed in August 1917, it may not have been first lit until 1918. Today, the tower's 1,500 candlepower occulting white light is powered by commercial electricity, although it was gas-powered for several years after its initial completion. The tower was originally constructed to be tall, and an additional was added to the tower in 1949. It was constructed atop an rise on the island, making the current total focal height of the lighthouse above lake level.

Terningen Lighthouse () is a lighthouse in the municipality of Hitra in Trøndelag county, Norway. The lighthouse is located in the Trondheimsleia near the mouth of the Hemnfjorden, just west of the island of Hemnskjela, and about southwest of the village of Sandstad. The light marks one of the main channels that leads to the Trondheimsfjorden. The tall lighthouse has an occulting light that flashes white, red, and green (depending on direction) once every six seconds at an elevation of above sea level.

A critical point for the fluid management in some medical specialties is to adjust the intravascular volume replacement. An incorrect practice can seriously affect the organ function and hence the outcome. Guiding fluid management using standard physiologic variables such as BP and HR, because of their regulated nature, is usually insensitive to changes in intravascular volume and may be misleading for example occulting a hypo-perfusion state. Therefore, optimizing the cardiac preload with fluid administration guided by BP is not reliable.

While transiting the system also clearly exhibits the Rossiter–McLaughlin effect, shifting in photospheric spectral lines caused by the planet occulting a part of the rotating stellar surface. Due to its high mass and close orbit, the parent star has a very large semi- amplitude (K), the "wobble" in the star's radial velocity, of 205 m/s. The Rossiter–McLaughlin effect allows the measurement of the angle between the planet's orbital plane and the equatorial plane of the star. These are well aligned, misalignment equal to -0.5°.

The light was "eclipsed" (darkened) every 17 seconds by lowering a metal cylinder around the burner for 3 seconds, thus giving rise to the term "occulting type".National Heritage Board, "The Lighthouse" (On-site information board). Though the Lighthouse survived the destruction of the Second World War, it was finally closed and dismantled on December 1958, when new tall buildings were making it invisible from the sea. It was replaced by a new signal light using electricity that was erected on top of the Fullerton Building.

Initially oil-lit, the lighthouse was converted to electricity in 1941 to enable the light to be lit briefly (as and when requested by allied ships and convoys) and then extinguished. Then, in 1957, the lighthouse was converted to acetylene gas operation. A new, smaller, gas- driven revolving optic was installed, which flashed once every fifteen seconds; and the subsidiary lights were provided with occulting mechanisms, also gas-driven. The new systems were automated; the keepers therefore moved out and their cottages were demolished.

A space sunshade or sunshield is a parasol that diverts or otherwise reduces some of a star's radiation, preventing them from hitting a spacecraft or planet and thereby reducing its insolation, which results in reduced heating. Light can be diverted by different methods. First proposed in 1989, the original space sunshade concept involves putting a large occulting disc, or technology of equivalent purpose, between the Earth and Sun. A sunshade is of particular interest as a climate engineering method for mitigating global warming through solar radiation management.

Variations in the brightness of the star give evidence of instabilities in the star's atmosphere, or else the presence of an occulting companion. The orbits of binary stars can be used to measure the relative masses of each companion, or the total mass of the system. Spectroscopic binaries can be found by observing doppler shifts in the spectrum of the star and its close companion. Stars of identical masses that formed at the same time and under similar conditions typically have nearly identical observed properties.

The main light was visible for 18 miles out to sea. A subsidiary (red) light was shown from a window lower down on the tower 'from half flood to half ebb' to signal the state of the tide (during the day a red spherical day mark was displayed in place of the red light). In December 1895 the characteristic of the main light was changed from fixed to occulting (going dark for one second every five seconds).London Gazette, Issue 26696, Page 16, 3 January 1896.

The tapering wooden tower is of the salt shaker design, painted white, with a red lantern and balcony, although pictures from 2008 show an all-white tower and lantern. It has a broad vertical red stripe to mark the range line, matching the stripe on the front range tower. Both the front and rear lights display an occulting yellow light, flashing every eleven seconds, and both have a range of 16 nautical miles. The light is automatic, but only operates seasonally between April and December.

When originally built, the lamp was mounted on a skeletal steel tower (the footprint of which can still be seen within the compound) which stood alongside the white building which housed an acetylene plant to power the lamp.Vintage postcard showing original arrangement. (A similar arrangement can be seen today at Peninnis Lighthouse in the Isles of Scilly.) It was a sector light with a group occulting characteristic (showing two eclipses every 15 seconds). During electrification in 1975 the tower was removed, and the lantern was placed instead on top of the (now redundant) acetylene building.

James Douglass designed a new lighthouse for Winterton shortly after being appointed Engineer-in-Chief at Trinity House in 1863, and subsequently oversaw its construction. The new tower was cylindrical and (again) coloured red. It was topped by a new 14 ft- diameter cylindrical lantern structure, in which, in 1868, Trinity House installed a large (first-order) fixed optic (engineered by James Chance); it displayed, as previously, a fixed white light. In 1910 the light characteristic was altered to occulting; thenceforward the light was eclipsed four times every 90 seconds.

Voyager 1 view of haze on Titan's limb (1980) Titan is never visible to the naked eye, but can be observed through small telescopes or strong binoculars. Amateur observation is difficult because of the proximity of Titan to Saturn's brilliant globe and ring system; an occulting bar, covering part of the eyepiece and used to block the bright planet, greatly improves viewing. Titan has a maximum apparent magnitude of +8.2, and mean opposition magnitude 8.4. This compares to +4.6 for the similarly sized Ganymede, in the Jovian system.

In 1949, the 'sixty-miler' Munmorah, was the last ship to be wrecked there. The Court of Marine Inquiry into the loss of the Munmorah was not satisfied that the occulting light was on at the time of the stranding. Another difficulty of operations at ocean jetties was storm damage or collision damage to the jetty, which could close the port suddenly and keep it closed pending repairs. Loading at the ocean jetties needed to be fast to minimise the time that the 'sixty-miler' stood alongside the jetty.

The first lighthouse, built in 1912, was a metal skeletal tower on piles, which was deactivated in 1934 when became operational the current. The lighthouse consists of a two-stages cylindrical stone tower, high, with double balcony and lantern. The tower is painted white, on the upper stage are painted two black horizontal bands facing the range line, on the east side, in order to have the lighthouse more visible during the day. The Range Rear light is positioned at above sea level and emits an occulting white light in a 6 seconds period, visible up to a distance of .

The light was initially powered by a six-wick Argand oil burner;Application note 32064 – Southwold Conversion , Pelangi. Retrieved 4 January 2013. it displayed a group occulting characteristic (the light being eclipsed twice every 20 seconds) and had a visible range of .London Gazette, Issue 26090, Page 5098, 23 September 1890 The light was white, but shone red across defined sectors to the north and to the south (indicating the Barnard sands and Sizewell Bank respectively); in addition, 'spare' light, which would otherwise have shone needlessly westwards, was diverted by way of vertical condensing prisms so as to intensify these red sectors.

The lighthouse was built in 1864 on project by Achille Rossi and was lit for the first time on September 6, 1866.Il faro di Santa Maria di Leuca The tower, built in bricks, has an hexagonal prism shape with balcony and lantern atop a two-storey keeper's house. It has a height of , and is placed at above sea level. The lantern has a diameter of and emits three white flashes in a 15 seconds period visible up to while a red occulting light every 4 seconds is shown over the shoal to the east.

Fort Canning Lighthouse was built on the southern side of Fort Canning Hill to guide ships safely towards the Singapore Harbour. The first signal light on Fort Canning was a simple lantern attached to the top of the Flagstaff in 1855. The Flagstaff light was replaced by the Lighthouse in 1903 by Riley, Hargreaves & Co., who in 1909 combined with another company to form United Engineers that is still present to this day at nearby River Valley. The light was created by a burner fuelled by kerosene, which generated 20,000 candlepower and itself was dioptric occulting type.

The relatively large eccentricities together with the mutual inclination of the orbits of the satellites are unexpected as they should have been damped by the tidal effects. A relatively recent passage by a 3:1 resonance with Hiʻiaka might explain the current excited orbits of the Haumean moons. At present, the orbits of the Haumean moons appear almost exactly edge-on from Earth, with Namaka periodically occulting Haumea. Observation of such transits would provide precise information on the size and shape of Haumea and its moons, as happened in the late 1980s with Pluto and Charon.

Pallas has been observed occulting stars several times, including the best-observed of all asteroid occultation events, by 140 observers on 29 May 1983. These measurements resulted in the first accurate calculation of its diameter. After an occultation on 29 May 1979, the discovery of a possible tiny satellite with a diameter of about 1 km was reported, which was never confirmed. Radio signals from spacecraft in orbit around Mars and/or on its surface have been used to estimate the mass of Pallas from the tiny perturbations induced by it onto the motion of Mars.

For 7 March 2017, a stellar occultation by Orcus had been predicted to take place in the Americas and over the Pacific Ocean. Observations were made at five sites in North and South America, and two solid body chords have been observed. Using speckle imaging, the occulted star was revealed to be a close double star, and a reconstruction of the orbits of Orcus and Vanth showed that both chords were from Vanth (occulting either of the two stars) rather than Orcus. A non-detection at a nearby site placed a constraint of () on the diameter of Vanth.

There are five satellites capable of completely occulting the Sun: Amalthea, Io, Europa, Ganymede and Callisto. All of the others are too small or too distant to be able to completely occult the Sun, so can only transit the Sun. Most of the more distant satellites also have orbits that are strongly inclined to the plane of Jupiter's orbit, and would rarely be seen to transit. When the four largest satellites of Jupiter, the Galilean satellites, occult the Sun, a shadow transit can be seen on the surface of Jupiter which can be observed from Earth in telescopes.

Historical information from Coast Guard web site: > :By Harmon Lougher, Photographer’s Mate First Class It was decided to > relocate the light on top of the fog signal building and demolish the old > tower. The Cabrillo National Monument, National Park Service, requested the > lens and light for their museum soon to be built. Arrangements have been > made for that Service to remove the lantern and lens prior to the demolition > of the tower. The new light is a standard lens with storm panes, which will > be an occulting white, six second light, three seconds off, three seconds > on.

Point 2 - The Lighthouse, BBC Suffolk. Retrieved 2012-10-29. The demolition of the low light led to the High Light being repainted with red bands, so as to differentiate it more clearly from the lighthouse at Winterton; at the same time it was also provided with an occulting mechanism to differentiate the light itself. The light source was changed to paraffin in 1910, and then to an automated acetylene system in 1929; this meant that there was no further need for keepers to be permanently accommodated on site, and the keepers' cottages were then sold.

Each was equipped with a paraffin lamp and a large (first-order) fixed optic designed by Chance Brothers. A pair of single-storey keepers' cottages was attached to each tower. Whitby Fog Signal In 1890, a more efficient light was installed in the South Light, allowing the North Light to be deactivated: an occulting mechanism was installed, which eclipsed the light once every thirty seconds, and a red sector was added marking Whitby Rock. The former Low Lightouse was then demolished but the site was retained for a building to house new fog signalling apparatus, including a compressed air plant powered by two Hornsby horizontal 25-horsepower oil engines.

Two lighthouses are present on Graemsay: Hoy Sound Low and Hoy Sound High located at the extremities of the northern side of the island. The lights were built in 1851 on project by Alan Stevenson; both are cylindrical tower with balcony and lantern, even if of different heights, white painted with black lantern and the typical ochre trims. The Hoy High Light, known as Graemsay Island Range Rear, is high and has a white and red occulting light every 8 seconds depending on the directions. The Hoy Low Light (Graemsay Island Range Front) is high and is distinguished by a white isophase light every 3 seconds.

A notable example of this occurred in 2002 when the asteroid 345 Tercidina underwent a stellar occultation of a very bright star as seen from Europe. During this event a team of at least 105 observers recorded 75 chords across the asteroid's surface allowing for a very accurate size and shape determination. (Chords) In addition to using a known orbit to determine an objects size, the reverse process can also be used. In this usage the occulting object's size is taken to be known and the occultation time can be used to determine the length of the chord the background object traced across the foreground object.

Lantern detail The need for the lighthouse was identified in the third maritime lighting plan for the Canaries in 1989, as a navigation aid for coastal shipping on the east coast of the island. It first entered service in 1993, and stands on a cliff around eight metres above sea level, next to the Atlantic Ocean which gives the lantern a focal height of . The light has a range of 20 nautical miles, and has an occulting light characteristic which consists of a pattern of three flashes of white light every eight seconds. The white cylindrical tower with a curved tip is considered to be of a "striking modern" design.

In Meteorologica (1 343b30) Aristotle mentions that he observed Jupiter in conjunction with and then occulting a star in Gemini. This is the earliest-known observation of this nature.Star Names: Their Lore and Meaning by Richard Hinckley Allen, Dover, 1963, page 229 A study published in 1990 suggests the star involved was 1 Geminorum and the event took place on 5 December 337 BC. When William Herschel discovered Uranus on 13 March 1781 it was located near η Gem.Star Names: Their Lore and Meaning by Richard Hinckley Allen, Dover, 1963, page 236 In 1930 Clyde Tombaugh exposed a series of photographic plates centred on δ Gem and discovered Pluto.

Since the clearing of vegetation and Aboriginal cultural sites from the Cape Byron headland in 1899 for the construction of the lightstation, the site has undergone little modification other than operational upgrades, building maintenance and provision of visitor facilities to the site. Modifications were undertaken at various times which served to modernise or enhance the operation and/or character of the light. The original mechanical occulting equipment was removed in July 1905 resulting in a change to the original characteristic of the light with one more favoured by mariners. The original six wick burner was replaced with a vaporised kerosene mantle in March 1914.

As part of the upgrade, a much more powerful, revolving lens system was introduced for the primary optic: a Stone-Chance 2nd Order Catadioptric optic. By a complex arrangement of lenses and shades, the optic displayed an isophase white light (5 seconds on, 5 seconds off) when seen from most directions, but was seen as a red occulting light (on for 5.8 seconds, off for 4.2 seconds) within the red sector, covering the Pearl Rock. In addition, at this time, a separate red sector light was added, which projected a fixed red beam across the same sector from a room below the main light. To accommodate the new equipment, the height of the tower was increased by .

London Gazette, Issue 25806, Page 2076, 10 April 1888 Instead, in 1888, red and green sectors were added to the high light, which was made occulting (with the light being eclipsed for three seconds in every forty). A subsidiary white light was also introduced, shining "north-eastward from a window 60 feet below the high light, visible over an arc of about 25°, covering Aldborough ridge, and to assist vessels in rounding Orfordness". The lighthouse was further modernized in 1914: a new revolving optic was installed (which remained in use for 99 years), and a new additional light was installed along with fixed lenses at a level below the lantern, so the sector lights now shone from windows on the tower.

It was thought some of the apparent planets might instead have been brown dwarfs, objects intermediate in mass between planets and stars. In 1990, additional observations were published that supported the existence of the planet orbiting Gamma Cephei, but subsequent work in 1992 again raised serious doubts. Finally, in 2003, improved techniques allowed the planet's existence to be confirmed. Coronagraphic image of AB Pictoris showing a companion (bottom left), which is either a brown dwarf or a massive planet. The data was obtained on 16 March 2003 with NACO on the VLT, using a 1.4 arcsec occulting mask on top of AB Pictoris. On 9 January 1992, radio astronomers Aleksander Wolszczan and Dale Frail announced the discovery of two planets orbiting the pulsar PSR 1257+12.

The timing and duration of passes depends on the characteristics of the orbit a satellite occupies, as well as the ground topography and any occulting objects on the ground (such as buildings), or in space (for planetary probes, or for spacecraft using relay satellites). An observer directly on the ground track of the satellite will experience the greatest ground pass duration. Path loss is greatest toward the start and end of a ground pass, as is Doppler shifting for Earth-orbiting satellites. Satellites in geosynchronous orbit may be continuously visible from a single ground station, whereas satellites in low Earth orbit only offer short-duration ground passes (although longer contacts may be made via relay satellite networks such as TDRSS).

The new lighthouse was still under construction in late November 1866 when Henry Norris was sued by a painter in court in Whitehaven who had not been paid for lettering a notice board at the lighthouse; but it was operational by the end of the year. By the 1890s it was displaying a group-occulting light, on the following pattern: visible for 24 seconds, eclipsed for 2 seconds, visible for 2 seconds, eclipsed for 2 seconds; the light could be seen up to out to sea. From 1913 an explosive fog signal was sounded from the lighthouse; it remained operational into the second half of the century.Admiralty Chart, 1925, 1955 In the interwar period the lighthouse was used as a turning marker in the London to Isle of Man air races.

While space-based coronagraphs such as LASCO avoid the sky brightness problem, they face design challenges in stray light management under the stringent size and weight requirements of space flight. Any sharp edge (such as the edge of an occulting disk or optical aperture) causes Fresnel diffraction of incoming light around the edge, which means that the smaller instruments that one would want on a satellite unavoidably leak more light than larger ones would. The LASCO C-3 coronagraph uses both an external occulter (which casts shadow on the instrument) and an internal occulter (which blocks stray light that is Fresnel-diffracted around the external occulter) to reduce this leakage, and a complicated system of baffles to eliminate stray light scattering off the internal surfaces of the instrument itself.

North Foreland lighthouse in about 1890, showing the keepers' cottages and modernised tower. In June 1860 a red sector was added to the light, which shone northwards 'to enable vessels at night to keep to the eastward of Margate Sand'.London Gazette, Issue 22401, Page 2544, 6 July 1860 In 1880 the light characteristic was changed from fixed to occulting (being eclipsed for five seconds every half minute);London Gazette, Issue 24871, Page 4322, 6 August 1880 In 1884 the lighthouse was restored and improved: the interior of the tower (which had previously contained rooms on several storeys) was completely gutted and an inner circular brick wall was constructed, which supported a new cantilevered stone staircase leading from ground level to the service room, immediately below the lantern.

Later, it became clear that the period variations followed a 2.09 day sinusoidal curve around the 4.84 second period. These variations in arrival time of the pulses were attributed to the Doppler effect caused by orbital motion of the source, and were therefore evidence for the binary nature of Centaurus X-3. Despite detailed data from the Uhuru satellite as to the orbital period of the binary, and the pulsation period in the X-ray band as well as the minimum mass of the occulting star, the optical component remained undiscovered for three years. This was partly because Cen X-3 lies in the plane of the Galaxy in the direction of the Carina Spiral Arm, and so observations were forced to differentiate among dozens of faint objects.

In 1831, the lighthouse was described as having a distinctive occulting characteristic as follows: "This light appears in full force like a star one minute and a half, and is then eclipsed half a minute. It is lighted throughout the night, and is seen at the distance of one or two leagues, according to the state of cloudiness or clearness of the atmosphere". Trinity House soon resolved to replace the lighthouse with "a far more elegant, and much loftier structure, about half a mile northward of the former building, and which, from its greater altitude, as well as from there being no land intervenient to the point of view, must be perceptible at a far greater distance". At the same time, they planned to erect a second light on the foreshore, the two together being designed to function as leading lights.

Many others were commissioned during the nineteenth century, especially off England's east coast and the approaches to the Thames, where there were many treacherous shoals. Lightship LV86, on station at the Nore from 1931 to 1974 Following their acquisition of the patent, all English and Welsh lightvessels were maintained by Trinity House, with the exception of the four vessels in the approaches to the River Mersey, which were maintained by the Mersey Docks and Harbour Board until 1973, and those in the Humber Estuary, which were the responsibility of the Humber Conservancy Board. In order to act as effective daymarks Trinity House lightvessels were painted red, with the station name in large white letters on the side of the hull, and a system of balls and cones at the masthead for identification. The first revolving light was fitted to the Swin Middle lightvessel in 1837: others used occulting or flashing lights.

Both lighthouses were built in 1819 (the Low Light was rebuilt in 1832), both were painted white and each was lit by a single Argand light mounted within a parabolic reflector. In the 19th century the lights were tidal: rather than being lit all night, they were only displayed between half-flood and half-ebb, when they signalled safe passage over Bideford Bar (a notorious sand bank which renders entry into the Taw Torridge Estuary hazardous at low tide). From 1879 the High Light began to be displayed all night, regardless of the state of the tide;London Gazette, Issue 24747, Page 4701, 29 July 1879 and in 1889 it was made occulting (the light being eclipsed for two seconds every thirty seconds).London Gazette, Issue 25957, Page 4017, 26 July 1889 The Low Light remained tidal (later an additional red or green light signalled the state of the tide, and a spherical daymark was used during hours of daylight).

Eclipses of the Sun from Jupiter are not particularly rare, since Jupiter is very large and its axial tilt (which is related to the plane of the orbits of its satellites) is relatively small—indeed, the vast majority of the orbits of all five of the objects capable of occulting the Sun will result in a solar occultation visible from somewhere on Jupiter. The related phenomenon of satellite eclipses in the shadow of Jupiter has been observed since the time of Giovanni Cassini and Ole Rømer in the mid Seventeenth Century. It was soon noticed that predicted times differed from observed times in a regular way, varying from up to ten minutes early to up to ten minutes late. Rømer used these errors to make the first accurate determination of the speed of light, correctly realizing that the variations were caused by the varying distance between Earth and Jupiter as the two planets moved in their orbits around the Sun.

It initially displayed a fixed red light with a white sector indicating a clear approach running south of Durlestone Head and past a pair of sandbanks: South- west Shingles and Dolphin Bank. Later a narrow white sector marked the approach from the north-east past Warden Ledge; By 1884 a further (green) sector had been added and the light made occulting. The tower itself had initially been left as plain granite 'not coated nor coloured', but in 1886, so as to make it stand out more prominently against the cliffs during the day, it was painted with a broad black stripe around the middle; the metalwork of the lantern was also painted black, and dark curtains were hung within the glass when the lamp was not in use.London Gazette, Issue 25564, Page 1035, 2 March 1886 In 1922, a more powerful incandescent paraffin vapour burner was installed, which increased the intensity of the light from 35,000 to 500,000 candlepower.

Under Thomas Meik as engineer the docks were further extended with the construction of Hendon Dock to the south (1864–67). (Hendon Dock was entered via Hudson Dock South, but in 1870 it too was provided with a half-tidal sea-entrance providing direct access from the North Sea.) Under Meik's successor, Henry Hay Wake, Hudson Dock was further enlarged and the entrances were improved: in 1875 lock gates were installed (along with a swing bridge) at the river entrance, to allow entry at all states of the tide; they were powered by hydraulic machinery, installed by Sir William Armstrong in the adjacent dock office building. Similarly, a new sea lock was constructed at the south-east entrance in 1877–80. The breakwater (known as the 'Northeast Pier') which protected the sea entrance to the docks was provided with a lighthouse ( high and of lattice construction, since demolished) which Chance Brothers equipped with a fifth- order optic and clockwork occulting mechanism in 1888; it displayed a sector light: white indicating the fairway and red indicating submerged hazards.

Chariklo is the largest confirmed member of a class of small bodies known as centaurs, which orbit the Sun between Saturn and Uranus in the outer Solar System. Forecasts had shown that, as seen from South America, it would pass in front of the 12.4-magnitude star UCAC4 248-108672, located in the constellation Scorpius, on 3 June 2013. Video showing the occultation of the star UCAC4 248-108672 by Chariklo and the corresponding lightcurve With the aid of thirteen telescopes located in Argentina, Brazil, Chile, and Uruguay, a team of astronomers led by Felipe Braga Ribas (), a post-doctoral astronomer of the National Observatory (ON), in Rio de Janeiro, and 65 other researchers from 34 institutions in 12 countries, was able to observe this occultation event, a phenomenon during which a star disappears behind its occulting body. The 1.54-metre Danish National Telescope at La Silla Observatory, due to the much faster data acquisition rate of its 'Lucky Imager' camera (10 Hz), was the only telescope able to resolve the individual rings.

The building of the present granite tower used much of the equipment that had previously been used in the construction of the Wolf Rock Lighthouse. It was equipped with a first-order fixed optic built by Dr John Hopkinson of Chance Brothers. The tower was first lit in December 1873, having cost £43,870 to build, and displayed a fixed white light with two red sectors (to warn ships away from the Brisons, to the north-east, and Rundlestone, to the south-east). Initially the new lighthouse was fitted with a fog bell, which sounded two strokes every fifteen seconds; In 1883 Longstone was altered to show an occulting light (eclipsed for three seconds every minute); an explosive fog signal was introduced at the same time, sounding twice every ten minutes.London Gazette, Issue: 25226, Page: 2315, 1 May 1883 The bell was retained for use as an alternative signal, put to use if the explosive signal was not working, until 1897 when it was removed.London Gazette, Issue: 26901, Page: 5734, 19 October 1897 Even after these improvements, however, the S.S. Bluejacket was wrecked on rocks near the lighthouse on a clear night in 1898, nearly demolishing the lighthouse in the process.

Accommodation for two keepers was provided in a 'neat white brick building' alongside. The new Low Light (also known as Lowestoftness Lighthouse) was lit by a three-wick oil burner set within a second-order fixed catadioptric optic designed by James Timmins Chance, which gave a visible range of . It was first lit on 15 January 1867 and shone red out to sea but with two white sectors indicating the safe inshore water (or Roads) to the north and the south.London Gazette, Issue 23210, Page 323, 18 January 1867 A fog bell was also provided, which sounded three times every fifteen seconds; it was rung by clockwork. In 1874 the light was converted to run on mineral oil, which was stored in four 220-gallon tanks installed at the base of the tower. In 1881, the Low Light was again improved and showed an occulting light (being eclipsed for three seconds every thirty seconds).London Gazette, Issue 24887, Page 5118, 1 October 1880 In 1883, due to the encroaching sea, the lighthouse was moved inland.London Gazette, Issue 25254, Page 3766, 27 July 1883 In 1894 a reed fog horn had been installed; it sounded a seven-second blast every half minute during foggy weather.