Astronomy:NGC 6342
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Short description: A Globular cluster in the constellation Ophiuchus
| 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 | [math]\displaystyle{ \begin{smallmatrix}\left[\ce{Fe}/\ce{H}\right]\end{smallmatrix} }[/math] = −0.55[3] dex |
| Other designations | GCL 61 and ESO 587-SC6 |
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 is classified as metal-rich, yet has only one generation of stars.[3]
See also
References
- ↑ 1.0 1.1 1.2 1.3 "Revised NGC Data for NGC 6342". http://spider.seds.org/ngc/revngcic.cgi?NGC6342.
- ↑ 2.0 2.1 "Object No. 1 - NGC 6342". NASA/IPAC. http://ned.ipac.caltech.edu/cgi-bin/objsearch?objname=NGC+6342&extend=no&hconst=73&omegam=0.27&omegav=0.73&corr_z=1&out_csys=Equatorial&out_equinox=J2000.0&obj_sort=RA+or+Longitude&of=pre_text&zv_breaker=30000.0&list_limit=5&img_stamp=YES.
- ↑ 3.0 3.1 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, doi:10.3847/0004-6256/152/1/21, Bibcode: 2016AJ....152...21J
- ↑ "NGC 6342 (= GCL 61)". http://cseligman.com/text/atlas/ngc63.htm#6342.
- ↑ "NGC 6342". http://spider.seds.org/spider/MWGC/n6342.html.
- ↑ "The globular cluster NGC 6342". https://in-the-sky.org/data/object.php?id=5097.
External links
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