0.77
Apparent Mag16.73
Distance (ly)A7V
Spectral Type7,670
Temperature (K)Altair is the brightest star in Aquila and the twelfth-brightest in the night sky. It rotates rapidly, completing a rotation in about 10 hours, which gives it a noticeably oblate shape.
Stellar Data
Apparent Magnitude0.77
Absolute Magnitude2.21
Distance16.73 light-years
Spectral TypeA7V
Temperature7,670 K
Luminosity10.6 L☉
Radius1.63 R☉
Mass1.79 M☉
Right Ascension19h 50m 47.0s
Declination+08° 52′ 06.0″
ConstellationAquila
Notable Facts
- Altair rotates in about 10 hours, making it significantly oblate
- It forms one vertex of the Summer Triangle asterism
- Its rapid rotation was the first to be directly imaged using interferometry