B-type star · blue-white star
HR 4857
HR 4857 is a blue-white star in the constellation Hydra 740 ly from Earth. Its surface is about 10,912 K, about 1.9 times the Sun's surface temperature, and it shines at 120× the Sun's brightness. At magnitude 6.4 it is within reach of 50 mm binoculars; the light you see left it 740 years ago.
Also catalogued as HD 111226 · HIP 62448
10,912 K
temperature
6.43
apparent magnitude
120× ☉
luminosity vs Sun
B8V
spectral type
Distance & comparison with our Sun
740 years
at light speed from Earth
1.89×
as hot as the Sun
120×
the Sun's light output
-0.35
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.