K-type star · orange

Sigma Oph

Sigma Oph is an orange in the constellation Ophiuchus 901 ly from Earth. Its surface is about 3,824 K, about 0.7 times the Sun's surface temperature, and it shines at 1,220× the Sun's brightness. At magnitude 4.3 it is bright enough to see with the naked eye; the light you see left it 901 years ago.

901 lybrightness mag 4.34K3IIvar

Also catalogued as HR 6498 · HD 157999 · HIP 85355

3,824 K
temperature
4.34
apparent magnitude
1,220× ☉
luminosity vs Sun
K3IIvar
spectral type
Distance & comparison with our Sun
901 years
at light speed from Earth
0.66×
as hot as the Sun
1,220×
the Sun's light output
-2.87
absolute magnitude
Explore from here · roam the neighborhood
Sigma OphK-type
Sky regionOphiuchusthis direction
StarHR 663392 ly
StarHR 6358120 ly
StarHR 6412190 ly
StarSabikstar
StarZeta Ophstar
Nearest stars
Bright stars in Ophiuchus
Can you see it tonight?
VISIBLE TO THE NAKED EYE
Brightness mag 4.3To see it no equipment neededLook toward Ophiuchus

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.