M-type star · red

31 Ori

31 Ori is a red in the constellation Orion 508 ly from Earth. Its surface is about 3,660 K, about 0.6 times the Sun's surface temperature, and it shines at 276× the Sun's brightness. At magnitude 4.7 it is bright enough to see with the naked eye; the light you see left it 508 years ago.

508 lybrightness mag 4.71K5III

Also catalogued as HR 1834 · HD 36167 · HIP 25737

3,660 K

temperature

4.71

apparent magnitude

276× ☉

luminosity vs Sun

K5III

spectral type

Distance & comparison with our Sun

508 years

at light speed from Earth

0.63×

as hot as the Sun

276×

the Sun's light output

-1.25

absolute magnitude

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31 OriM-type

Sky regionOrionthis direction

Nearest stars

Bright stars in Orion

Can you see it tonight?

VISIBLE TO THE NAKED EYE

Brightness mag 4.7To see it no equipment neededLook toward Orion

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.