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Proper NameDubhe
Bayer DesignationAlpha Ursae Majoris
Flamsteed Number50 Ursae Majoris
HR (BSC)4301
ConstellationUrsa Major
Right Ascension11h 3m 44s
Declination+61° 45' 4"
Distance123 light years
38 parsecs
MagnitudeApparent: +1.8
Absolute: -1.1
Spectral ClassK0IIIa orange giant
Optimum VisibilityMarch (Usually visible from northern latitudes)
NotesDubhe (pronounced doob-heh) is a multiple system, in which the primary star Alpha Ursae Majoris A is an orange giant, which is orbited by a less massive F-type bright yellow dwarf. On the fringes of the system, a further pair of dwarf stars orbit one another as they follow a path around the primary giant.

A prominent and relatively bright orange star that belongs to one constellation and two asterisms. It marks the centre of the Great Bear's back (its name means 'bear'), and is also the tip of the Plough's share, and the northern of the two Pointers. It has a faint companion that orbits it every 44 years, and further binary pair in a more distant orbit.

Imagery provided by Aladin sky atlas


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