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The Horse and Rider

Mizar and Alcor

GenitiveUrsae Majoris
AbbreviationUMa
Right Ascension13h 23m 56s to 13h 25m 14s
Declination+54° 55' 31" to +54° 59' 17"
Separation11' 48.6"
Brightest StarMizar
Optimum VisibilityApril / May (Usually visible from northern latitudes)
Map of the Horse and Rider in Ursa Major
Map of the Horse and Rider in Ursa Major
13 24 34.540 +54 57 23.96
FoV: 2°
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The brighter of the two main stars shown here is second-magnitude Mizar or Zeta Ursae Majoris, the Horse of this asterism. Its Rider is fourth-magnitude Alcor or g Ursae Majoris. The two stars are separated by less than twelve arcminutes on the celestial sphere, and indeed are physically close to one another in space, probably lying less than a light year apart. Imagery provided by Aladin sky atlas

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