K-type star · orange
51 Her
51 Her is an orange in the constellation Hercules 698 ly from Earth. Its surface is about 4,220 K, about 0.7 times the Sun's surface temperature, and it shines at 388× the Sun's brightness. At magnitude 5.0 it is bright enough to see with the naked eye; the light you see left it 698 years ago.
Also catalogued as HR 6270 · HD 152326 · HIP 82504
4,220 K
temperature
5.03
apparent magnitude
388× ☉
luminosity vs Sun
K2II-III
spectral type
Distance & comparison with our Sun
698 years
at light speed from Earth
0.73×
as hot as the Sun
388×
the Sun's light output
-1.62
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.