| 释义 |
- See also
- External links
- References
{{Infobox cluster
| name = NGC 637
| image =
| epoch = J2000.0
| class = I2m[1]
| ra = {{RA|01|43.1}}
| dec = {{DEC|+64|02}}
| dist_ly = {{Convert|7045|ly|pc|abbr=on}}
| appmag_v = 8.2[5]
| size_v = 4.2′[1]
| mass_kg =
| mass_msol =
| radius_ly =
| v_hb =
| age = {{nowrap|10 ± 5 myr}}[1]
| notes =
| names = NGC 637, Collinder 17[5] }}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 {{Convert|9.8|ly|pc}}. The estimated age of this cluster is 5–15 million years.[1]The cluster was discovered on 9 November 1787 by astronomer William Herschel.[1] See also - Open cluster
- List of NGC objects (1–1000)
- Cassiopeia (constellation)
External links References1. ^{{Cite web|url=http://cseligman.com/text/atlas/ngc6.htm#637|title=New General Catalog Objects: NGC 600 - 649|website=cseligman.com|language=en-US|access-date=2018-01-05}}
2. ^1 2 3 4 {{cite journal | title=Optical and near-infrared photometric study of the open cluster NGC 637 and 957 | author=Yadav, R. K. S. | display-authors=4 | author2=Kumar, Brijesh | author3=Subramaniam, A. | author4=Sagar, Ram | author5=Mathew, Blesson | journal=Monthly Notices of the Royal Astronomical Society | volume=390 | issue=3 | pages=985–996 |date=November 2008 | doi=10.1111/j.1365-2966.2008.13740.x | bibcode=2008MNRAS.390..985Y |arxiv = 0810.1409 }}
3. ^1 2 {{cite web | title=NGC 637 -- Open (galactic) Cluster | work=SIMBAD | publisher=Centre de Données astronomiques de Strasbourg | url=http://simbad.u-strasbg.fr/simbad/sim-id?Ident=NGC+637 | accessdate=2011-01-28 }}
}}{{Ngc10}}{{Sky|01|43.1|0||+64|02|0|190000000}}{{DEFAULTSORT:NGC 0637}}{{Star-cluster-stub}} 5 : NGC objects|Open clusters|Cassiopeia (constellation)|Discoveries by William Herschel|Astronomical objects discovered in 1787 |