B-type star · blue-white star

Phi Dra

Phi Dra is a blue-white star in the constellation Draco 303 ly from Earth. Its surface is about 11,456 K, about 2.0 times the Sun's surface temperature, and it shines at 154× the Sun's brightness. At magnitude 4.2 it is bright enough to see with the naked eye; the light you see left it 303 years ago.

303 lybrightness mag 4.22A0p (Si)

Also catalogued as HR 6920 · HD 170000 · HIP 89908

11,456 K

temperature

4.22

apparent magnitude

154× ☉

luminosity vs Sun

A0p (Si)

spectral type

Distance & comparison with our Sun

303 years

at light speed from Earth

1.98×

as hot as the Sun

154×

the Sun's light output

-0.62

absolute magnitude

Explore from here · roam the neighborhood

Phi DraB-type

Sky regionDracothis direction

Nearest stars

Bright stars in Draco

Can you see it tonight?

VISIBLE TO THE NAKED EYE

Brightness mag 4.2To see it no equipment neededLook toward Draco

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.