M-type star · red
37 Oph
37 Oph is a red in the constellation Ophiuchus 1,091 ly from Earth. Its surface is about 3,659 K, about 0.6 times the Sun's surface temperature, and it shines at 726× the Sun's brightness. At magnitude 5.3 it is bright enough to see with the naked eye; the light you see left it 1,091 years ago.
Also catalogued as HR 6393 · HD 155644 · HIP 84177
3,659 K
temperature
5.32
apparent magnitude
726× ☉
luminosity vs Sun
M2III
spectral type
Distance & comparison with our Sun
1,091 years
at light speed from Earth
0.63×
as hot as the Sun
726×
the Sun's light output
-2.30
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.