Alpha Persei Cluster
Lua error in Module:Infobox at line 235: malformed pattern (missing ']').
The Alpha Persei Cluster, also known as Melotte 20 or Collinder 39, is an open cluster in the constellation of Perseus. To the naked eye, the cluster consists of several blue spectral type B type 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 Hipparcos satellite and infrared color-magnitude diagram fitting have been used to establish a distance to the cluster of ~172 pc.[2][3] The distance established via the independent analyses agree, thereby making the cluster an important rung on the cosmic distance ladder. The age of this cluster is about 50-70 million years.[1][4]
Members
| Designations | Spectral type & Luminosity class |
Comments |
|---|---|---|
| α Per (33 Per) | F5Ib | |
| δ Per (39 Per) | B5III | |
| ε Per (45 Per) | B1V | |
| ψ Per | B5Ve | |
| 29 Per | B3V | |
| 30 Per | B8V | |
| 34 Per | B3V | |
| 48 Per | B3Ve |
References
<templatestyles src="Reflist/styles.css" />
Cite error: Invalid <references> tag; parameter "group" is allowed only.
<references />, or <references group="..." />External links
- Alpha Persei Moving Cluster, Mel 20
- The Alpha Persei Cluster (Mel 20)
- Spectral types in the Alpha Persei Cluster
Coordinates: 
03h 22m 00s, +49° 00′ 00″
.
<templatestyles src="Asbox/styles.css"></templatestyles>
 |
This star cluster–related article is a stub. You can help Wikipedia by expanding it. |
- ↑ 1.0 1.1 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 2.0 2.1 van Leeuwen, F. "Parallaxes and proper motions for 20 open clusters as based on the new Hipparcos catalogue", A&A, 2009
- ↑ 3.0 3.1 Majaess, D.; Turner, D.; Lane, D.; Krajci, T. "Deep Infrared ZAMS Fits to Benchmark Open Clusters Hosting delta Scuti Stars", JAAVSO, 2011
- ↑ Paunzen, E., Mermilliod, J.-C. "WEBDA: Alpha Persei"
