NGC 5694
(Redirected fromCaldwell 66)
| NGC5694 | |
|---|---|
 The core of NGC 5694 imaged by theHubble Space Telescope | |
| Observation data (J2000epoch) | |
| Class | VII[1] |
| Constellation | Hydra |
| Right ascension | 14h39m36.5s[2] |
| Declination | −26° 32′ 18.0″[2] |
| Distance | 114,100ly[1] |
| Apparent magnitude(V) | 10.2[1] |
| Apparent dimensions(V) | 3.6′[1] |
| Physical characteristics | |
| Metallicity | = –1.74[3]dex |
| Estimated age | 13.44Gyr[3] |
| Other designations | Caldwell66 |
![{\displaystyle {\begin{smallmatrix}\left[{\ce {Fe}}/{\ce {H}}\right]\end{smallmatrix}}}](https://wikimedia.org/api/rest_v1/media/math/render/svg/4c0821bd80891e071c08e7c7ee8e022baedf522c)
NGC 5694(also known asCaldwell 66) is aglobular clusterin theconstellationHydra.It was discovered in 1784 byWilliam Herschel.
Characteristics
[edit]This globular cluster is located at a distance of 114,000 light-years (35,000 pc) from theSunand 96,000 light-years (29,000 pc) from theGalactic Center[4]and is one of the oldest known globular clusters in theMilky Way Galaxy,forming nearly 12 billion years ago.[5]
Its chemical composition is highly peculiar, being highly (to nearly solar levels) enriched inalpha elements,suggesting an extragalactic origin before being captured by the Milky Way.[6]
See also
[edit]References
[edit]- ^abcd"Results for NGC 5694".SEDS NGC Catalog Online.Retrieved2010-12-07.
- ^ab"NGC 5694".SIMBAD.Centre de données astronomiques de Strasbourg.Retrieved2010-12-07.
- ^abForbes, 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,S2CID51825384.
- ^Harris, W.E. (1996)."A Catalog of Parameters for Globular Clusters in the Milky Way".The Astronomical Journal.112:1487.Bibcode:1996AJ....112.1487H.doi:10.1086/118116.
- ^"NGC/IC Project".Results for NGC 5694.Archived fromthe originalon 2012-05-20.Retrieved2010-12-07.
- ^Mucciarelli, A.; Bellazzini, M.; Catelan, M.; Dalessandro, E.; Amigo, P.; Correnti, M.; Cortés, C.; d'Orazi, V. (2013), "NGC 5694: Another foster son of the Galactic halo★",Monthly Notices of the Royal Astronomical Society,435(4): 3667–3680,arXiv:1308.6653,doi:10.1093/mnras/stt1558
External links
[edit]
Media related toNGC 5694at Wikimedia Commons- NGC 5694 onWikiSky:DSS2,SDSS,GALEX,IRAS,Hydrogen α,X-Ray,Astrophoto,Sky Map,Articles and images
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