M-type star · red
104 Her
104 Her is a red in the constellation Hercules 545 ly from Earth. Its surface is about 3,590 K, about 0.6 times the Sun's surface temperature, and it shines at 252× the Sun's brightness. At magnitude 5.0 it is bright enough to see with the naked eye; the light you see left it 544 years ago.
Also catalogued as HR 6815 · HD 167006 · HIP 89172
3,590 K
temperature
4.96
apparent magnitude
252× ☉
luminosity vs Sun
M3III
spectral type
Distance & comparison with our Sun
544 years
at light speed from Earth
0.62×
as hot as the Sun
252×
the Sun's light output
-1.15
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.