B-type star · blue-white star
Alnair
Alnair is a blue-white star in the constellation Grus 101 ly from Earth. Its surface is about 11,092 K, about 1.9 times the Sun's surface temperature, and it shines at 170× the Sun's brightness. At magnitude 1.7 it is bright enough to see with the naked eye; the light you see left it 101 years ago.
Also catalogued as Alpha Gru · HR 8425 · HD 209952 · HIP 109268 · Gliese Gl 848.2
11,092 K
temperature
1.73
apparent magnitude
170× ☉
luminosity vs Sun
B7IV
spectral type
Distance & comparison with our Sun
101 years
at light speed from Earth
1.92×
as hot as the Sun
170×
the Sun's light output
-0.72
absolute magnitude
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VISIBLE TO THE NAKED EYE
Star data from the HYG database v4.2 (Astronexus, CC BY-SA 4.0). Temperature and colour computed by gravityfinder from the B-V colour index; the illustration is generated from that temperature, not a photograph.