Altair

Altair (α Aql, α Aquilae, Atair) is the brightest star in the constellation Aquila and the twelfth brightest star in Terra's night sky. Altair is an A7 V main sequence star with an apparent visual magnitude of 0.77, 1.8 Solar Masses and 11 times Sol's luminosity. It is 16.7 light-years (5.13 parsecs) from Earth and is one of the closest stars visible to the human eye.

Altair rotates rapidly, with a velocity at the equator of approximately 286 km/s (a rotational period of about 5.34 Standard hours). Altair is not spherical, but is flattened at the poles due to its high rate of rotation. The equatorial radius of the star is 2.03 solar radii, and the polar radius 1.63 solar radii—a 25% increase of the stellar radius from pole to equator.