B-type star · blue-white star
Sigma Her
Sigma Her is a blue-white star in the constellation Hercules 315 ly from Earth. Its surface is about 10,290 K, about 1.8 times the Sun's surface temperature, and it shines at 170× the Sun's brightness. At magnitude 4.2 it is bright enough to see with the naked eye; the light you see left it 315 years ago.
Also catalogued as HR 6168 · HD 149630 · HIP 81126
10,290 K
temperature
4.20
apparent magnitude
170× ☉
luminosity vs Sun
B9Vvar
spectral type
Distance & comparison with our Sun
315 years
at light speed from Earth
1.78×
as hot as the Sun
170×
the Sun's light output
-0.72
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.