Alnair - α Gruis (alpha Gruis)
Alnair, also designated as α Gruis (alpha Gruis), is a variable and double sub-giant star of spectral class B7 in the constellation of Grus.
Alnair visual magnitude is 1.74, making it the 30th brightest star in the sky. Because of its brightness, Alnair is clearly visible to the naked eye when observed from locations with dark skies, and should be also quite easily visible from light polluted areas.
Celestial Coordinates
Apparent
J2000
Galactic Coordinates
Finder Chart
Magnitude, Color, Spectral Class
The red dot in the diagram below shows where Alnair is situated in the Hertzsprung–Russell diagram.
Star System Properties
Alnair is a visual double star which can be observed only with the help of very large telescopes. The table below shows key information about the Alnair double sysyem:
Distance, Radial Speed, Proper Motion
Alnair is distant 101.37 light years from the Sun and it is moving far from the Sun at the speed of 12 kilometers per second.
Alternative Designations
Visibility from Your Location
Alnair - α Gruis (alpha Gruis) is currently not visible from Greenwich, UK