Astronomy:NGC 559
| NGC 559 | |
|---|---|
 PanSTARRS image of NGC 559 | |
| Observation data (J2000 epoch) | |
| Constellation | Cassiopeia[1] |
| Right ascension | 01h 29m 31.20s[2] |
| Declination | +63° 18′ 07.2″[2] |
| Distance | 7200 ly (2200 pc[2]) |
| Apparent magnitude (V) | +9.5[1] |
| Apparent dimensions (V) | 7′[1] |
| Physical characteristics | |
| Other designations | Caldwell 8, Cr 13 |
NGC 559 (also known as Caldwell 8) is an open cluster and Caldwell object in the northern constellation of Cassiopeia. It shines at magnitude +9.5. Its celestial coordinates are RA 01h 29.5m, dec +63° 18′. It is located near the open cluster NGC 637, and the bright magnitude +2.2 irregular variable star Gamma Cassiopeiae. The cluster is 7 arcmins across.[3]
It was discovered by William Herschel in 1787.[4]
The object is also called Ghost's Goblet. This name was coined by astronomer Stephen J. O'Meara, as the center of the star cluster, with a little imagination, is reminiscent of a still photograph of a jeweled goblet that is about to vanish in a ghostly manner. O'Meara attributes the impression of fading to the low brightness (about +12) of many stars in the center as well as to the great age of the star cluster, which is about 1.8 billion years old.[5]
References
- ↑ 1.0 1.1 1.2 Finlay, Warren H. (2014). Concise Catalogue of Deep-Sky Objects. The Patrick Moore Practical Astronomy Series (2nd ed.). Springer Cham. p. 158. doi:10.1007/978-3-319-03170-5. ISBN 978-3-319-03169-9.
- ↑ 2.0 2.1 2.2 Kharchenko, N. V. et al. (2013), "Global survey of star clusters in the Milky Way. II. The catalogue of basic parameters", Astronomy and Astrophysics 558: 8, doi:10.1051/0004-6361/201322302, A53, Bibcode: 2013A&A...558A..53K.
- ↑ Seligman, Courtney. "Celestial Atlas: NGC Objects: NGC 550 - 599". http://cseligman.com/text/atlas/ngc5a.htm#559.
- ↑ "Open Cluster NGC 559 | Deep⋆Sky Corner". https://www.deepskycorner.ch/obj/ngc559.en.php.
- ↑ O’Meara, Stephen James (2016): The Caldwell Objects. 2nd edition, Cambridge, Cambridge University Press, ISBN 978-1-107-08397-4, pp. 49–51
External links
- Frommert, Harmut. "Revised NGC Data for NGC 559". Spider. Students for the Exploration and Development of Space. http://spider.seds.org/ngc/revngcic.cgi?NGC559.
- "NGC 559". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=NGC+559.
- "NED results for object NGC 0559". NASA/IPAC Extragalactic Database. National Aeronautics and Space Administration / Infrared Processing and Analysis Center. http://nedwww.ipac.caltech.edu/cgi-bin/nph-objsearch?objname=NGC+559&extend=no&out_csys=Equatorial&out_equinox=J2000.0&obj_sort=RA+or+Longitude&of=pre_text&zv_breaker=30000.0&list_limit=5&img_stamp=YES.
- NGC 559 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
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