B-type star · blue-white star
51 Cyg
51 Cyg is a blue-white star in the constellation Cygnus 1,274 ly from Earth. Its surface is about 11,692 K, about 2.0 times the Sun's surface temperature, and it shines at 911× the Sun's brightness. At magnitude 5.4 it is bright enough to see with the naked eye; the light you see left it 1,274 years ago.
Also catalogued as HR 7929 · HD 197511 · HIP 102177
11,692 K
temperature
5.41
apparent magnitude
911× ☉
luminosity vs Sun
B2V
spectral type
Distance & comparison with our Sun
1,274 years
at light speed from Earth
2.03×
as hot as the Sun
911×
the Sun's light output
-2.55
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.