NGC 637
| NGC 637 | |
|---|---|
 | |
| Observation data (J2000.0 epoch) | |
| Right ascension | 01h 43.1m [1] |
| Declination | +64° 02′[1] |
| Distance | 7,045 ly (2,160 pc)[1] |
| Apparent magnitude (V) | 8.2[2] |
| Apparent dimensions (V) | 4.2′[3] |
| Physical characteristics | |
| Estimated age | 10 ± 5 myr[3] |
| Other designations | NGC 637, Collinder 17[2] |
| Associations | |
NGC 637 is an open cluster of stars in the constellation Cassiopeia. It has a Trumpler classification of I2m and an angular diameter of 4.2′. At a distance of approximately 7,045 light years, this corresponds to a diameter of 9.8 light-years (3.0 pc). The estimated age of this cluster is 5–15 million years.[3][1]
The cluster was discovered on 9 November 1787 by astronomer William Herschel.[4]
See also
External links
- NGC 637 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
- SEDS
References
- ^ a b c d Kharchenko, N. V.; Piskunov, A. E.; Röser, S.; Schilbach, E.; et al. (August 2005). "Astrophysical parameters of Galactic open clusters". Astronomy and Astrophysics. 438 (3): 1163–1173. arXiv:astro-ph/0501674. Bibcode:2005A&A...438.1163K. doi:10.1051/0004-6361:20042523.
- ^ a b "NGC 637 -- Open (galactic) Cluster". SIMBAD. Centre de Données astronomiques de Strasbourg. Retrieved 2011-01-28.
- ^ a b c Yadav, R. K. S.; Kumar, Brijesh; Subramaniam, A.; Sagar, Ram; et al. (November 2008). "Optical and near-infrared photometric study of the open cluster NGC 637 and 957". Monthly Notices of the Royal Astronomical Society. 390 (3): 985–996. arXiv:0810.1409. Bibcode:2008MNRAS.390..985Y. doi:10.1111/j.1365-2966.2008.13740.x.
{{cite journal}}: CS1 maint: unflagged free DOI (link) - ^ "New General Catalog Objects: NGC 600 - 649". cseligman.com. Retrieved 2018-01-05.
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