M-type star · red
HR 3820
HR 3820 is a red in the constellation Leo 572 ly from Earth. Its surface is about 3,657 K, about 0.6 times the Sun's surface temperature, and it shines at 159× the Sun's brightness. At magnitude 5.6 it is bright enough to see with the naked eye; the light you see left it 572 years ago.
Also catalogued as HD 83069 · HIP 47168
3,657 K
temperature
5.57
apparent magnitude
159× ☉
luminosity vs Sun
M2III
spectral type
Distance & comparison with our Sun
572 years
at light speed from Earth
0.63×
as hot as the Sun
159×
the Sun's light output
-0.65
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.