B-type star · blue-white star
21 Aql
21 Aql is a blue-white star in the constellation Aquila 711 ly from Earth. Its surface is about 11,107 K, about 1.9 times the Sun's surface temperature, and it shines at 363× the Sun's brightness. At magnitude 5.1 it is bright enough to see with the naked eye; the light you see left it 711 years ago.
Also catalogued as HR 7287 · HD 179761 · HIP 94477
11,107 K
temperature
5.14
apparent magnitude
363× ☉
luminosity vs Sun
B8II-III
spectral type
Distance & comparison with our Sun
711 years
at light speed from Earth
1.92×
as hot as the Sun
363×
the Sun's light output
-1.55
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.