NGC 362
NGC 362 | |
---|---|
Observation data | |
Class | III[1] |
Constellation | Tucana |
Right ascension | 01h 03m 14.26s[2] |
Declination | −70° 50′ 55.6″[2] |
Distance | 29.29 ± 0.20 kly (8.98 ± 0.06 kpc)[3] |
Apparent magnitude (V) | 6.4 |
Apparent dimensions (V) | 12.9′ |
Physical characteristics | |
Metallicity | = –1.09[4] dex |
Estimated age | 11.0 ± 0.6 Gyr[3] |
Other designations | Melotte 4 |
NGC 362 (also known as Caldwell 104) is a globular cluster located in the constellation Tucana in the Southern Hemisphere, slightly north of the Small Magellanic Cloud. It was discovered on August 1, 1826 by James Dunlop.[5] It is visible to the naked eye in dark skies, and is an impressive sight in a telescope, although it is somewhat overshadowed by its larger and brighter neighbour 47 Tucanae.[6]
The stars of NGC 362 have an average metallicity higher than the stars in most globulars. This implies that NGC 362 is a relatively young globular cluster.[6] It also has an overabundance of binary stars, and an exceptionally tight core 13 light-years in diameter.[6] The orbit of NGC 362 is highly eccentric, taking it to within 3,260 light-years of the galactic center.[6]
See also[]
- List of globular clusters
References[]
- ^ Shapley, Harlow; Sawyer, Helen B. (August 1927), "A Classification of Globular Clusters", Harvard College Observatory Bulletin, 849 (849): 11–14, Bibcode:1927BHarO.849...11S.
- ^ a b Goldsbury, Ryan; et al. (December 2010), "The ACS Survey of Galactic Globular Clusters. X. New Determinations of Centers for 65 Clusters", The Astronomical Journal, 140 (6): 1830–1837, arXiv:1008.2755, Bibcode:2010AJ....140.1830G, doi:10.1088/0004-6256/140/6/1830.
- ^ a b Gontcharov, George A.; Khovritchev, Maxim Yu; Mosenkov, Aleksandr V.; Il'In, Vladimir B.; Marchuk, Alexander A.; Savchenko, Sergey S.; Smirnov, Anton A.; Usachev, Pavel A.; Poliakov, Denis M. (2021). "Isochrone fitting of Galactic globular clusters – III. NGC 288, NGC 362, and NGC 6218 (M12)". Monthly Notices of the Royal Astronomical Society. 508 (2): 2688–2705. doi:10.1093/mnras/stab2756.
- ^ Forbes, Duncan A.; Bridges, Terry (May 2010), "Accreted versus in situ Milky Way globular clusters", Monthly Notices of the Royal Astronomical Society, 404 (3): 1203–1214, arXiv:1001.4289, Bibcode:2010MNRAS.404.1203F, doi:10.1111/j.1365-2966.2010.16373.x.
- ^ "NGC 362". SEDS. Retrieved 28 June 2015.
- ^ a b c d O'Meara, Stephen James (2003). Deep Sky Companions: The Caldwell Objects. Cambridge University Press. pp. 409–412. ISBN 9780521827966.
External links[]
- Media related to NGC 362 at Wikimedia Commons
- "NGC 362". SIMBAD. Centre de données astronomiques de Strasbourg.
- Vu, Linda (20 June 2007). "Galaxy Evolution Explorer Spies Band of Stars". NASA.
- Caldwell objects
- Astronomical objects discovered in 1826
- Globular clusters
- NGC objects
- Tucana (constellation)
- Discoveries by James Dunlop