Alpha Persei Cluster
To the naked eye, the cluster has 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, Sigma, Psi, 29, 30, 34 and 48 Persei. The Hipparcos satellite and infrared color-magnitude diagram fitting show the cluster as about ~172 parsecs away from us.
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- Prosser, Charles F.; Randich, Sofia; Stauffer, Joh R.; Schmitt J.H.M.M.; Simon, Theodore (1996). "ROSAT Pointed observations of the Alpha Persei Cluster". Astronomical Journal. 112: 1570. Bibcode:1996AJ....112.1570P. doi:10.1086/118124.
- Paunzen, E., Mermilliod, J.-C. "WEBDA: Alpha Persei"