Alpha Persei Cluster
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Jump to navigationJump to searchThe Alpha Persei Cluster, also known as Melotte 20 or Collinder 39, is an open cluster consisting of several blue type B stars. The most luminous member is the ~2nd magnitude white-yellow supergiant Mirfak, also known as Alpha Persei. Bright members also include Delta, Epsilon, Psi, 29, 30, 34 and 48 Persei. The age of this cluster is about 50-70 million years.
Members
| Designations | Spectral type & Luminosity class |
Comments |
|---|---|---|
| α Per (33 Per) | F5Ib | |
| δ Per (39 Per) | B5III | |
| ε Per (45 Per) | B1V | |
| ψ Per | ||
| 29 Per | ||
| 30 Per | ||
| 34 Per | ||
| 48 Per |
