NGC 265
| NGC 265 | |
|---|---|
 | |
| Observation data (J2000 epoch) | |
| Right ascension | 00h 47m 35.8s[1] |
| Declination | −73° 45′ 11″[1] |
| Distance | 200 kly[2] |
| Apparent dimensions (V) | 0.6′[3] |
| Physical characteristics | |
| Mass | 4,200±900[3] M☉ |
| Radius | 47 ly (14.5 pc)[3] |
| Estimated age | 250±120 Myr[4] |
| Other designations | Cl Lindsay 34, ESO 29-14, SMC−OGLE 39[5] |
| Associations | |
| Constellation | Tucana |
NGC 265 is an open cluster of stars in the southern constellation of Tucana. It is located in the Small Magellanic Cloud,[4] a nearby dwarf galaxy. The cluster was discovered by English astronomer John Herschel on April 11, 1834. J. L. E. Dreyer described it as, "faint, pretty small, round", and added it as the 265th entry in his New General Catalogue.[6]
This cluster has an angular core radius of 18″ and a physical radius of approximately 47 ly.[3] It has a combined 4,200[3] times the mass of the Sun and is around 250 million years old.[4] The metallicity of the cluster – what astronomers term the abundance of elements with higher atomic number than helium – is at around −0.62, or only 24% of that in the Sun. The turn-off mass for the cluster, when a star of that mass begins to evolve off the main sequence into a giant, is about 4.0 to 4.5 M☉.[7]
See also
[edit | edit source]References
[edit | edit source]- ^ a b Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value). See the Vizier VII/1B/catalog entry for NGC 265.
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External links
[edit | edit source]- Error creating thumbnail: File missing Media related to Lua error in Module:Commons_link at line 62: attempt to index field 'wikibase' (a nil value). at Wikimedia Commons
- ESA Hubble space telescope site: Hubble picture in information on NGC 265
- HubbleSite NewsCenter: Information on NGC 265 and the Hubble picture
- Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
