B-type star · blue-white star
Upsilon Her
Upsilon Her is a blue-white star in the constellation Hercules 371 ly from Earth. Its surface is about 11,473 K, about 2.0 times the Sun's surface temperature, and it shines at 146× the Sun's brightness. At magnitude 4.7 it is bright enough to see with the naked eye; the light you see left it 371 years ago.
Also catalogued as HR 5982 · HD 144206 · HIP 78592
11,473 K
temperature
4.72
apparent magnitude
146× ☉
luminosity vs Sun
B9III
spectral type
Distance & comparison with our Sun
371 years
at light speed from Earth
1.99×
as hot as the Sun
146×
the Sun's light output
-0.56
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.