F-type star · yellow-white star

31 Cap

31 Cap is a yellow-white star in the constellation Capricornus 312 ly from Earth. Its surface is about 7,223 K, about 1.3 times the Sun's surface temperature, and it shines at 11.87× the Sun's brightness. At magnitude 7.1 it is within reach of 50 mm binoculars; the light you see left it 312 years ago.

312 lybrightness mag 7.07F0V

Also catalogued as HR 8139 · HD 202723 · HIP 105168

7,223 K

temperature

7.07

apparent magnitude

11.87× ☉

luminosity vs Sun

F0V

spectral type

Distance & comparison with our Sun

312 years

at light speed from Earth

1.25×

as hot as the Sun

11.87×

the Sun's light output

2.16

absolute magnitude

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31 CapF-type

Sky regionCapricornusthis direction

Nearest stars

Bright stars in Capricornus

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BINOCULARS NEEDED

Brightness mag 7.1To see it 50 mm binocularsLook toward Capricornus

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.