Coma Star Cluster
Coordinates: 
12h 22m 30s, +25° 51′ 00″
12h 22m 30s, +25° 51′ 00″| Coma Star Cluster | |
|---|---|
| Apparent magnitude (V) | +1.8 |
| Apparent dimensions (V) | 7.5° [2] |
| Physical characteristics | |
| Mass | - M☉ |
| Radius | - |
| Estimated age | - |
| Second closest open cluster[citation needed] | |
| Other designations | Coma Ber Cluster,[1] Cr 256,[4] Mel 111,[1] OCl 558.0[1] |
| Associations | |
| Constellation | Coma Berenices |
The Coma Star Cluster (also known as Melotte 111 or Collinder 256) is a nearby
Ptolemy III
renamed it for the Egyptian queen Berenice's legendary sacrifice of her hair.
The color-magnitude diagram fitting have been used to establish a distance to the cluster's center of approximately 86 parsecs (280 ly).[2][3] The distance established via the independent analyses agree, thereby making the cluster an important rung on the cosmic distance ladder. The open cluster is roughly twice as distant as the Hyades and covers an area of more than 7.5 degrees on the sky.[2][3] The cluster is approximately 450 million years old.
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| Identifier | Magnitude |
|---|---|
| γ Com[a] | 4.81 |
| 12 Com | 4.81 |
| 31 Com | 4.94 |
| 14 Com | 4.95 |
| 16 Com | 4.96 |
| 13 Com | 5.18 |
| 17 Com | 5.24 |
| 21 Com | 5.44 |
| 18 Com[b] | 5.47 |
| HD 106887 | 5.71 |
| HD 105805 | 5.99 |
| 8 Com | 6.22 |
| 22 Com | 6.24 |
| FM Com | 6.43 |
See also
References
- ^ a b c d e "Cl Melotte 111 -- Open (galactic) Cluster". SIMBAD. Retrieved 23 October 2013.
- ^ S2CID 16420237.
- ^ Bibcode:2011JAVSO..39..219M.
- ^ Houston, Walter Scott. "Open Clusters by the Season". Sky & Telescope. p. 8. Retrieved 23 October 2013.[permanent dead link]
- S2CID 119416393.
External links
Media related to Melotte 111 at Wikimedia Commons- WEBDA page for open cluster Coma Ber by Masaryk University
- SEDS – Melotte 111
