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Altair

Alpha Aquilae, 53 Aquilae

Proper NamesAltair
Bayer DesignationAlpha Aquilae
Flamsteed Number53 Aquilae
HR (BSC)7557
HD187642
ConstellationAquila
Right Ascension19h 51m 34s
Declination+8° 54' 45"
Distance17 light years
5 parsecs
MagnitudeApparent: +0.9
Absolute: +2.4
Spectral ClassA7V White Main Sequence Star
Optimum VisibilityJuly / August
NotesThis white star is only slightly larger than the Sun, but is prominent in the sky because it lies just 16.7 light years from the Solar System. Altair's rapid rotation gives it an oblate shape, with a distinct bulge around its equatorial regions.

A fairly massive white star, Altair is the brightest in the constellation of Aquila, the Eagle. It is one of the closest bright stars to Earth: just 17 light years away.

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