Hellenica World

Alpha Persei Cluster

Alpha Persei Cluster
Observation data (2000.0 epoch)
Constellation Perseus
Right ascension 03h 22m:
Declination +49° 0′:
Distance 600 ly ()
Apparent magnitude (V) 1.2
Apparent dimensions (V) 185'
Other designations Cr 39, Mel 20
See also: Open cluster, List of open clusters

The Alpha Persei Cluster, also known as Melotte 20 or Collinder 39, is an open cluster of stars in the constellation Perseus. It consists of several stars of spectral types O and B in the vicinity of Alpha Persei and is visible to the naked eye.


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