F-type star · yellow-white star

Tau Oph

Tau Oph is a yellow-white star in the constellation Ophiuchus 170 ly from Earth. Its surface is about 6,989 K, about 1.2 times the Sun's surface temperature, and it shines at 18.90× the Sun's brightness. At magnitude 5.2 it is bright enough to see with the naked eye; the light you see left it 170 years ago.

170 lybrightness mag 5.24dF3 J

Also catalogued as HR 6734 · HD 164765 · Gliese Gl 700.1A

6,989 K

temperature

5.24

apparent magnitude

18.90× ☉

luminosity vs Sun

dF3 J

spectral type

Distance & comparison with our Sun

170 years

at light speed from Earth

1.21×

as hot as the Sun

18.90×

the Sun's light output

1.66

absolute magnitude

Explore from here · roam the neighborhood

Tau OphF-type

Sky regionOphiuchusthis direction

Nearest stars

Bright stars in Ophiuchus

Can you see it tonight?

VISIBLE TO THE NAKED EYE

Brightness mag 5.2To 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.