A-type star · white star

Phi UMa

Phi UMa is a white star in the constellation Ursa Major 509 ly from Earth. Its surface is about 9,675 K, about 1.7 times the Sun's surface temperature, and it shines at 321× the Sun's brightness. At magnitude 4.5 it is bright enough to see with the naked eye; the light you see left it 509 years ago.

509 lybrightness mag 4.55A3IV

Also catalogued as HR 3894 · HD 85235 · HIP 48402

9,675 K

temperature

4.55

apparent magnitude

321× ☉

luminosity vs Sun

A3IV

spectral type

Distance & comparison with our Sun

509 years

at light speed from Earth

1.68×

as hot as the Sun

321×

the Sun's light output

-1.42

absolute magnitude

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Phi UMaA-type

Sky regionUrsa Majorthis direction

Nearest stars

Bright stars in Ursa Major

Can you see it tonight?

VISIBLE TO THE NAKED EYE

Brightness mag 4.5To see it no equipment neededLook toward Ursa Major

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.