How to use photometric brightness in a sentence? Find typical usage patterns (collocations)/phrases/context for "photometric brightness" and check conjugation/comparative form for "photometric brightness". Mastering all the usages of "photometric brightness" from sentence examples published by news publications.
The name was selected in the NameExoWorlds campaign by Lebanon, during the 100th anniversary of the IAU. Beirut is the capital and largest city of Lebanon. In 2002 the existence of the planet was questioned by G. Henry: The star was observed to have photometric brightness variations that have same period and velocities as the planet.
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All these satellites, except Phobos-Grunt, are non- resolved objects, thus photometry has been the only source of in-orbit status information. Over 50,000 photometric brightness estimates were obtained for the satellites both in the integral light and broadband BVR Johnson system filters. The UMOS is proven capable to run the whole study, from primary observations to analysis of the light curves and further determination of satellite orientation variations and origin of its possible damage.
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To standardize the magnitude scale, astronomers chose Vega to represent magnitude zero at all wavelengths. Thus, for many years, Vega was used as a baseline for the calibration of absolute photometric brightness scales. However, this is no longer the case, as the apparent magnitude zero point is now commonly defined in terms of a particular numerically specified flux. This approach is more convenient for astronomers, since Vega is not always available for calibration and varies in brightness.
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Vega has functioned as the baseline for calibrating the photometric brightness scale and was one of the stars used to define the zero point for the UBV photometric system. Vega is only about a tenth of the age of the Sun, but since it is 2.1 times as massive, its expected lifetime is also one tenth of that of the Sun; both stars are at present approaching the midpoint of their life expectancies. Vega has an unusually low abundance of the elements with a higher atomic number than that of helium. Vega is also a variable star that varies slightly in brightness.
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