Star
Alioth
White star · A0p
ε Ursae Majoris · Ursa Major
Shown in its true colour — like most stars, it is too far away to photograph as more than a point of light.
Alioth, also called Epsilon Ursae Majoris, is a star in the northern constellation of Ursa Major. The designation is Latinised from ε Ursae Majoris and abbreviated Epsilon UMa or ε UMa. Despite being designated "ε" (epsilon), it is the brightest star in the constellation and at magnitude 1.77 is the thirty-third brightest star in the sky.
Description from Wikipedia (CC BY-SA 4.0).
In your sky
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Key facts
Distance
~82.6 light-years
Apparent mag.
+1.76
Spectral type
A0p
Luminosity
110 × Sun
Absolute mag.
−0.26
Catalogue
HIP 62956
Spectral type
A0p
True colour from its B–V index (-0.02): a surface around 10400 K.
Did you know
- Alioth is also known as ε Ursae Majoris.
- Its spectral type A0p marks it as a white star.
- It lies in the constellation Ursa Major.
