B-type star · blue-white star

Theta Oph

Theta Oph is a blue-white star in the constellation Ophiuchus 436 ly from Earth. Its surface is about 13,256 K, about 2.3 times the Sun's surface temperature, and it shines at 766× the Sun's brightness. At magnitude 3.3 it is bright enough to see with the naked eye; the light you see left it 436 years ago.

436 lybrightness mag 3.27B2IV

Also catalogued as HR 6453 · HD 157056 · HIP 84970

13,256 K
temperature
3.27
apparent magnitude
766× ☉
luminosity vs Sun
B2IV
spectral type
Distance & comparison with our Sun
436 years
at light speed from Earth
2.30×
as hot as the Sun
766×
the Sun's light output
-2.36
absolute magnitude
Explore from here · roam the neighborhood
Theta OphB-type
Sky regionOphiuchusthis direction
StarHR 647425 ly
Star51 Oph35 ly
StarHR 649042 ly
StarSabikstar
StarZeta Ophstar
Nearest stars
Bright stars in Ophiuchus
Can you see it tonight?
VISIBLE TO THE NAKED EYE
Brightness mag 3.3To 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.