B-type star · blue-white star

84 UMa

84 UMa is a blue-white star in the constellation Ursa Major 290 ly from Earth. Its surface is about 10,639 K, about 1.8 times the Sun's surface temperature, and it shines at 36.91× the Sun's brightness. At magnitude 5.7 it is bright enough to see with the naked eye; the light you see left it 290 years ago.

290 lybrightness mag 5.68B9p EuCr

Also catalogued as HR 5187 · HD 120198 · HIP 67231

10,639 K

temperature

5.68

apparent magnitude

36.91× ☉

luminosity vs Sun

B9p EuCr

spectral type

Distance & comparison with our Sun

290 years

at light speed from Earth

1.84×

as hot as the Sun

36.91×

the Sun's light output

0.93

absolute magnitude

Explore from here · roam the neighborhood

84 UMaB-type

Sky regionUrsa Majorthis direction

Nearest stars

Bright stars in Ursa Major

Can you see it tonight?

VISIBLE TO THE NAKED EYE

Brightness mag 5.7To 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.