NGC 4609
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| NGC 4609 | |
|---|---|
 NGC 4609 (taken from Stellarium) | |
| Observation data (J2000 epoch) | |
| Right ascension | 12h 42m 19.7s[1] |
| Declination | −62° 59′ 42″[1] |
| Distance | 4,500 ly (1,379 pc)[1] |
| Apparent magnitude (V) | 6.9[2] |
| Apparent dimensions (V) | 6.5′.[1] |
| Physical characteristics | |
| Estimated age | 83.2 Myr[1] |
| Other designations | NGC 4609, Caldwell 98, Cr 263[3] |
| Associations | |
| Constellation | Crux |
NGC 4609 (also known as Caldwell 98) is an open cluster of stars in the southern constellation of Crux. It was discovered on May 12, 1826 by the Scottish astronomer James Dunlop.[4] The cluster has an apparent visual magnitude of 6.9[2] and spans an angular size of 6.5′.[1] It is situated beyond the Coalsack Nebula[5] at an estimated distance of 4,500 ly (1,379 pc) from the Sun.[1]
This is an intermediate age cluster[6] estimated at 83.2 Myr old.[1] It is a poorly populated cluster with just one red giant member. 33 probable members have been identified,[7] including the variable Be star BZ Crucis.[8] The metallicity of the cluster, as measured by the abundance of iron, is slightly larger than in the Sun.[7]
References
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- ^ a b Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
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- ^ a b Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
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
- NGC 4609 at WEBDA
- NGC 4609 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
