B-type star · blue-white star

57 Cyg

57 Cyg is a blue-white star in the constellation Cygnus 525 ly from Earth. Its surface is about 12,178 K, about 2.1 times the Sun's surface temperature, and it shines at 272× the Sun's brightness. At magnitude 4.8 it is bright enough to see with the naked eye; the light you see left it 525 years ago.

525 lybrightness mag 4.80B5V

Also catalogued as HR 8001 · HD 199081 · HIP 103089

12,178 K

temperature

4.80

apparent magnitude

272× ☉

luminosity vs Sun

B5V

spectral type

Distance & comparison with our Sun

525 years

at light speed from Earth

2.11×

as hot as the Sun

272×

the Sun's light output

-1.24

absolute magnitude

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57 CygB-type

Sky regionCygnusthis direction

Nearest stars

Bright stars in Cygnus

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VISIBLE TO THE NAKED EYE

Brightness mag 4.8To see it no equipment neededLook toward Cygnus

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.