NGC 188
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| NGC 188 | |
|---|---|
| Lua error in package.lua at line 80: module 'Module:InfoboxImage/data' not found. Deep exposure of Polaris, integrated flux nebulae, and NGC 188 | |
| Observation data (J2000 epoch) | |
| Right ascension | Template:RA[1] |
| Declination | Template:DEC[1] |
| Distance | 6,000 ly (1.85 kpc[2]) |
| Apparent magnitude (V) | 10.0[3] |
| Absolute magnitude (V) | Unknown |
| Apparent dimensions (V) | 15′ |
| Physical characteristics | |
| Radius | 11.8 ly |
| Estimated age | 6.41 ± 0.33 Gyr[2] |
| One of the oldest known open clusters | |
| Other designations | Caldwell 1, Cr 6, Mel 2[1] |
| Associations | |
| Constellation | Cepheus |
NGC 188 (also known as Caldwell 1 or the Polarissima Cluster[4]) is an open cluster in the constellation Cepheus. It was discovered by John Herschel in 1825. Unlike most open clusters that drift apart after a few million years because of the gravitational interaction of our Milky Way galaxy, NGC 188 lies far above the plane of the galaxy and is one of the most ancient of open clusters known, at approximately 6.8 billion years old.[2]
NGC 188 is very close to the North Celestial Pole, under five degrees away, and in the constellation of Cepheus at an estimated 6,000 light-years' distance, this puts it slightly above the Milky Way's disc and further from the center of the galaxy than the Sun.
References
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- ^ a b c Page Module:Citation/CS1/styles.css has no content."NGC 188". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2006-12-08.
{{cite web}}: Invalid|mode=Script error: No such module "Citation mode".(help) - ^ a b c Page Module:Citation/CS1/styles.css has no content.Yakut, Kadri; Kalomeni, Belinda; Rappaport, Saul (2025). "A novel approach to determining the age of stellar clusters: Application to NGC 188". Monthly Notices of the Royal Astronomical Society. 542 (3): 1817–1826. arXiv:2508.09255. Bibcode:2025MNRAS.542.1817Y. doi:10.1093/mnras/staf1332.
- ^ Page Module:Citation/CS1/styles.css has no content.Clark, R. N. (1990). Visual Astronomy of the Deep Sky. Cambridge University Press. p. 287. Bibcode:1990vads.book.....C. ISBN 978-0-521-36155-2.
- ^ Page Module:Citation/CS1/styles.css has no content.Stoyan, Ronald; Schurig, Stephan (2014). interstellarum Deep Sky Atlas. Erlangen: Cambridge University Press; Oculum-Verlag GmbH. ISBN 978-1-107-50338-0. OCLC 920437579.
External links
- Page Template:Sister-inline/styles.css has no content.Script error: No such module "Sister project logo". Media related to Script error: No such module "Commons link". at Wikimedia Commons
- NGC 188 at SEDS NGC objects pages
- NGC 188 Script error: No such module "webarchive". at NightSkyInfo.com
- Template:WikiSky
- NGC 188 at the SIMBAD Astronomical Database.
- Ids – Bibliography – Image – B&W Image.
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