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| NGC 146 | |
|---|---|
 Location of NGC 146 | |
| Observation data (J2000 epoch) | |
| Right ascension | 00 33 03.9 |
| Declination | +63° 18′ 32″ |
| Distance | ~10000 (~3000) |
| Apparent magnitude (V) | 9.1 |
| Physical characteristics | |
| Estimated age | <10 Myr |
| Other designations | Cr 5, OCl 299, C 0030+630 |
| Associations | |
| Constellation | Cassiopeia |
| See also: Open cluster, List of open clusters | |
NGC 146 is a small open cluster in the constellation Cassiopeia. It was discovered by John Herschel in 1829 using his father's 18.7 inch reflecting telescope.
Location
NGC 146 is fairly easy to locate in the sky, being half a degree away from the bright star Kappa Cassiopeiae. However, spotting the cluster itself is difficult because of its low apparent magnitude of 9.1. Its relatively high declination of about 63° means it is not visible for below 27° S. Its distance is estimated at 3030 parsecs (9880 light years ), but may be around 3500 pc (11000 ly) away.
Characteristics
The cluster is at most 10 million years old, as there are numerous B-type main sequence stars and pre-main-sequence stars but relatively few evolved supergiants. Among its most massive stars are two Herbig Be stars.
References
- ^ "NASA/IPAC Extragalactic Database". Results for NGC 0146. Retrieved 31 December 2016.
- ^ "NGC 146". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 31 December 2016.
- "Catalogo NGC/IC online - result for NGC 146". Archived from the original on May 28, 2009. Retrieved July 23, 2013.
- "WEBDA page for open cluster NGC 146".
- ^ Subramaniam, A.; Sahu, D. K.; Sagar, R.; Vijitha, P. (September 2005). "NGC 146: a young open cluster with a Herbig Be star and intermediate mass pre-main sequence stars". Astronomy and Astrophysics. 440 (2): 511‐522. arXiv:astro-ph/0505314. Bibcode:2005A&A...440..511S. doi:10.1051/0004-6361:20052683. S2CID 14909422.
Further reading
- "The NGC/IC Project". Archived from the original on 2013-01-15. Retrieved 2016-08-02.
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