Alioth - ε Ursae Majoris (epsilon Ursae Majoris)
Alioth, also designated as ε Ursae Majoris (epsilon Ursae Majoris), is a variable hypergiant star in the constellation of Ursa Major.
Alioth visual magnitude is 1.77, making it the 31th brightest star in the sky. Thanks to its high brightness, Alioth is clearly visible when observed from locations with dark skies, and should be also quite easily visible from light polluted areas.
The proper motion of Alioth is 0.112 arcsec per year in Right Ascension and -0.006 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.
Key facts about Alioth
Celestial coordinates and finder chart of Alioth
Alioth is situated north of the celestial equator, as such, it is more easily visible from the northern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of Alioth are provided in the following table:
The simplified sky map below shows the position of Alioth in the sky:
Visibility of Alioth from your location
Alioth - ε Ursae Majoris (epsilon Ursae Majoris) is circumpolar and transits at 02:08 UTC (altitude: 85.5°)
Distance of Alioth from the Sun and relative movement
Alioth is distant 80.89 light years from the Sun and it is moving towards the Sun at the speed of 9 kilometers per second.
Spectral properties of Alioth
The red dot in the diagram below shows where Alioth is situated in the Hertzsprung–Russell diagram.