B-type star · blue-white star
HR 2817
HR 2817 is a blue-white star in the constellation Gemini 3,167 ly from Earth. Its surface is about 13,348 K, about 2.3 times the Sun's surface temperature, and it shines at 2,120× the Sun's brightness. At magnitude 6.5 it is within reach of 50 mm binoculars; the light you see left it 3,167 years ago.
Also catalogued as HD 58050 · HIP 35933
13,348 K
temperature
6.47
apparent magnitude
2,120× ☉
luminosity vs Sun
B2Ve
spectral type
Distance & comparison with our Sun
3,167 years
at light speed from Earth
2.31×
as hot as the Sun
2,120×
the Sun's light output
-3.47
absolute magnitude
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BINOCULARS NEEDED
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.