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)
ClassIV[1]
ConstellationOphiuchus
Right ascension17h 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 designationsGCL 61 and ESO 587-SC6
See also: Globular cluster, List of globular clusters

NGC 6342 is classified as metal-rich, yet has only one generation of stars.[3]

See also

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References

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  1. ^ a b c d "Revised NGC Data for NGC 6342". Seds. Retrieved 14 October 2015.
  2. ^ a b "Object No. 1 - NGC 6342". NASA/IPAC extragalactic database. NASA/IPAC. Retrieved 14 October 2015.
  3. ^ 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
  4. ^ "NGC 6342 (= GCL 61)". cseligman. Retrieved 14 October 2015.
  5. ^ "NGC 6342". Seds. Retrieved 14 October 2015.
  6. ^ "The globular cluster NGC 6342". In-the-sky. Retrieved 14 October 2015.
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