B-type star · blue-white star
70 Cyg
70 Cyg is a blue-white star in the constellation Cygnus 1,305 ly from Earth. Its surface is about 12,293 K, about 2.1 times the Sun's surface temperature, and it shines at 1,057× the Sun's brightness. At magnitude 5.3 it is bright enough to see with the naked eye; the light you see left it 1,305 years ago.
Also catalogued as HR 8215 · HD 204403 · HIP 105942
12,293 K
temperature
5.30
apparent magnitude
1,057× ☉
luminosity vs Sun
B3V
spectral type
Distance & comparison with our Sun
1,305 years
at light speed from Earth
2.13×
as hot as the Sun
1,057×
the Sun's light output
-2.71
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.