Sections

Catalogues

Show the direction and distance to this object on the Galactic Map.

Proper Name	None
Bayer Designation	None
Flamsteed Number	78 Ursae Majoris
HR (BSC)	4931
HD	113139
Constellation	Ursa Major
Right Ascension	13h 0m 44s
Declination	+56° 21' 59"
Distance	83 light years 25 parsecs
Magnitude	Apparent: +4.94 Absolute: +2.91
Spectral Class	F2V bright yellow dwarf
Optimum Visibility	April (Usually visible from northern latitudes)

The bright star in the southwest (lower right) of this image is Alioth or Epsilon Ursae Majoris, the brightest star in the constellation of Ursa Major. This a close neighbour of 78 Ursae Majoris in space, but is an intensely luminous white star emitting some twenty times more light, and so appears much brighter in the sky. Though comparatively much less luminous than Alioth, 78 Ursae Majoris itself is some five times more luminous than the Sun. Imagery provided by Aladin sky atlas

A faint star that lies along the backbone of the Plough or Big Dipper, close to the much brighter Alioth. It is of the pale yellow 'F' classification, and a dwarf star like the Sun, but forms a binary system with an orbiting companion star.

v2.1g