K-type star · orange dwarf
51 Hya
51 Hya is an orange dwarf in the constellation Hydra 157 ly from Earth. Its surface is about 4,121 K, about 0.7 times the Sun's surface temperature, and it shines at 24.84× the Sun's brightness. At magnitude 4.8 it is bright enough to see with the naked eye; the light you see left it 157 years ago.
Also catalogued as HR 5381 · HD 125932 · HIP 70306
4,121 K
temperature
4.78
apparent magnitude
24.84× ☉
luminosity vs Sun
K3III
spectral type
Distance & comparison with our Sun
157 years
at light speed from Earth
0.71×
as hot as the Sun
24.84×
the Sun's light output
1.36
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.