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Proper NameAlpha Persei Cluster
Messier NumberNone
NGC/IC NumberNone
Other DesignationsCollinder 39, Melotte 20
ConstellationPerseus
Right Ascension3h 26m 28s
Declination+48° 58' 30"
Distance542 light years
166 parsecs
MagnitudeApparent: +2.29
Absolute: -3.81
DiameterApparent: 5°
Actual: 53 light years
Number of Starsc. 5,000
Optimum VisibilityNovember / December (usually visible from northern latitudes)

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