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[8] [9] Every interval of one magnitude equates to a variation in brightness of 5 √ 100 or roughly 2.512 times. Consequently, a magnitude 1 star is about 2.5 times brighter than a magnitude 2 star, about 2.5 2 times brighter than a magnitude 3 star, about 2.5 3 times brighter than a magnitude 4 star, and so on.
maximum brightness, [66] 725 times fainter than magnitude 6.5 naked eye skies +13.9 moon Titania: seen from Earth Maximum brightness; brightest moon of Uranus +14.1 star WR 102: seen from Earth Hottest known star +15.4: centaur Chiron: seen from Earth maximum brightness [67] +15.55: moon Charon: seen from Earth maximum brightness (the largest ...
Sky Quality Meter model SQM-L. A sky quality meter (SQM) is an instrument used to measure the luminance of the night sky, more specifically the Night Sky Brightness (NSB) at the zenith, with a bandwidth ranging from 390 nm to 600 nm. [1]
limiting magnitude with 12.5" reflector is 15; 6 Bright suburban sky 5.1–5.5 18.5–19.25 the zodiacal light is invisible; light pollution makes the sky within 35° of the horizon glow grayish white; clouds anywhere in the sky appear fairly bright; even high clouds (cirrus) appear brighter than the sky background; surroundings are easily visible
The Sun is the brightest star as viewed from Earth, at −26.78 mag.The second brightest is Sirius at −1.46 mag. For comparison, the brightest non-stellar objects in the Solar System have maximum brightnesses of:
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