B-type star · blue-white star

Alioth

Alioth is a blue-white star in the constellation Ursa Major 82.6 ly from Earth. Its surface is about 10,408 K, about 1.8 times the Sun's surface temperature, and it shines at 110× the Sun's brightness. At magnitude 1.8 it is bright enough to see with the naked eye; the light you see left it 83 years ago.

82.6 lybrightness mag 1.76A0p

Also catalogued as Epsilon UMa · HR 4905 · HD 112185 · HIP 62956

10,408 K

temperature

1.76

apparent magnitude

110× ☉

luminosity vs Sun

A0p

spectral type

Distance & comparison with our Sun

83 years

at light speed from Earth

1.80×

as hot as the Sun

110×

the Sun's light output

-0.26

absolute magnitude

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AliothB-type

Sky regionUrsa Majorthis direction

Nearest stars

Bright stars in Ursa Major

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VISIBLE TO THE NAKED EYE

Brightness mag 1.8To 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.