| Berkeley 87 | |
|---|---|
 | |
| Observation data (J2000 epoch) | |
| Right ascension | 20h 21m 43.01s1 |
| Declination | +37° 22′ 13.8″1 |
| Distance | ~1650 pc |
| Absolute magnitude (V) | 7.9 |
| Apparent dimensions (V) | 8 |
| Physical characteristics | |
| Other designations | Dolidze 7, OCl 161, C 2019+372, OCISM 34, MWSC 3325 |
| Associations | |
| Constellation | Cygnus |
Berkeley 87 is an open cluster in a heavily obscured region of the Milky Way in Cygnus.2 The rare WO type Wolf–Rayet star WR 142 is a member of Berkeley 87.3
This cluster contains HD 229059 which, as of August 2021, is the nearest known star to Earth with a bolometric luminosity greater than 1 million L☉.
References
References
- "Berkeley 87". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 31 December 2020.
- Turner, D. G.; Forbes, D. (1982). "Berkeley 87, a heavily-obscured young cluster associated with the ON2star-formation complex and containing the WO star Stephenson 3". Publications of the Astronomical Society of the Pacific. 94: 789–801. Bibcode:1982PASP...94..789T. doi:10.1086/131065. S2CID 123595477.
- Sokal, Kimberly R.; Skinner, Stephen L.; Zhekov, Svetozar A.; Güdel, Manuel; Schmutz, Werner (2010). "Chandra Detects the Rare Oxygen-type Wolf-Rayet Star WR 142 and OB Stars in Berkeley 87". The Astrophysical Journal. 715 (2): 1327–1337. arXiv:1004.0462. Bibcode:2010ApJ...715.1327S. doi:10.1088/0004-637X/715/2/1327. S2CID 119232391.
- Massey, P.; Degioia-Eastwood, K.; Waterhouse, E. (2001). "The Progenitor Masses of Wolf-Rayet Stars and Luminous Blue Variables Determined from Cluster Turnoffs. II. Results from 12 Galactic Clusters and OB Associations". The Astronomical Journal. 121 (2): 1050–1070. arXiv:astro-ph/0010654. Bibcode:2001AJ....121.1050M. doi:10.1086/318769. S2CID 53345173.