NGC 6342 is a globular cluster located in the constellation Ophiuchus. Its Shapley–Sawyer Concentration Class is IV,[1] and it was discovered by the German-born British astronomer William Herschel on 28 May 1786.[4] It is at a distance of 28,000 light years away from Earth.[5][6]
| NGC 6342 | |
|---|---|
 NGC 6342 as seen through the Hubble Space Telescope | |
| Observation data (J2000 epoch) | |
| Class | IV[1] |
| Constellation | Ophiuchus |
| Right ascension | 17h 21m 10.1s[2] |
| Declination | −19° 35′ 15″[2] |
| Apparent magnitude (V) | 9.66[1] |
| Apparent dimensions (V) | 4.40′ |
| Physical characteristics | |
| Absolute magnitude | −6.42[1] |
| Metallicity | = −0.55[3] dex |
| Other designations | GCL 61 and ESO 587-SC6 |
![{\displaystyle {\begin{smallmatrix}\left[{\ce {Fe}}/{\ce {H}}\right]\end{smallmatrix}}}](https://wikimedia.org/api/rest_v1/media/math/render/svg/4c0821bd80891e071c08e7c7ee8e022baedf522c)
NGC 6342 is classified as metal-rich, yet has only one generation of stars.[3]
See also
editReferences
edit- ^ a b c d "Revised NGC Data for NGC 6342". Seds. Retrieved 14 October 2015.
- ^ a b "Object No. 1 - NGC 6342". NASA/IPAC extragalactic database. NASA/IPAC. Retrieved 14 October 2015.
- ^ a b Johnson, Christian I.; Caldwell, Nelson; Rich, R. Michael; Pilachowski, Catherine A.; Hsyu, Tiffany (2016), "The Chemical Composition of Red Giant Branch Stars in the Galactic Globular Clusters NGC 6342 and NGC 6366", The Astronomical Journal, 152 (1): 21, arXiv:1606.08491, Bibcode:2016AJ....152...21J, doi:10.3847/0004-6256/152/1/21, S2CID 19812549
- ^ "NGC 6342 (= GCL 61)". cseligman. Retrieved 14 October 2015.
- ^ "NGC 6342". Seds. Retrieved 14 October 2015.
- ^ "The globular cluster NGC 6342". In-the-sky. Retrieved 14 October 2015.
External links
edit
Media related to NGC 6342 at Wikimedia Commons
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