B-type star · blue-white star
HR 8040
HR 8040 is a blue-white star in the constellation Cygnus 1,080 ly from Earth. Its surface is about 12,370 K, about 2.1 times the Sun's surface temperature, and it shines at 555× the Sun's brightness. At magnitude 5.6 it is bright enough to see with the naked eye; the light you see left it 1,080 years ago.
Also catalogued as HD 199955 · HIP 103530
12,370 K
temperature
5.59
apparent magnitude
555× ☉
luminosity vs Sun
B5Vn
spectral type
Distance & comparison with our Sun
1,080 years
at light speed from Earth
2.14×
as hot as the Sun
555×
the Sun's light output
-2.01
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.