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NGC 6352
Observation data (J2000 epoch)
Class	XI:
Constellation	Ara
Right ascension	17 25 29.11
Declination	–48° 25′ 19.8″
Distance	18.3 kly (5.6 kpc)
Apparent magnitude (V)	+7.8
Apparent dimensions (V)	7.1′
Physical characteristics
Mass	3.7×10 M☉
Tidal radius	10.5″
Metallicity	${\displaystyle {\begin{smallmatrix}\left\end{smallmatrix}}}$ = –0.70 dex
Estimated age	12.67 Gyr
Other designations	Caldwell 81, Cr 328, NGC 6352
See also: Globular cluster, List of globular clusters

NGC 6352 (also known as Caldwell 81) is a globular cluster of stars in the southern constellation of Ara, located approximately 18.3 kly from the Sun. It was discovered by Scottish astronomer James Dunlop on May 14, 1826. The cluster has a Shapley–Sawyer Concentration Class of XI:. A telescope with a 15 cm (5.9 in) aperture is required to resolve the stars within this loose cluster.

This cluster is about 12.67 billion years old with two distinct stellar populations; the second generation is only around 10 million years younger than the first. It lies approximately 13 kly (4 kpc) from the Galactic Center and 1.6 kly (0.5 kpc) from the galactic plane. The orbital motion of this cluster through the Milky Way suggests it is a member of the bulge or disk population. It is relatively metal-rich for an object of this class, having a metallicity of –0.70. The core radius is 49.8″ and the tidal radius is 10.5″.

References

1. ^ Shapley, Harlow; Sawyer, Helen B. (August 1927), "A Classification of Globular Clusters", Harvard College Observatory Bulletin, 849 (849): 11–14, Bibcode:1927BHarO.849...11S.
2. ^ Goldsbury, Ryan; et al. (December 2010), "The ACS Survey of Galactic Globular Clusters. X. New Determinations of Centers for 65 Clusters", The Astronomical Journal, 140 (6): 1830–1837, arXiv:1008.2755, Bibcode:2010AJ....140.1830G, doi:10.1088/0004-6256/140/6/1830, S2CID 119183070.
3. ^ Libralato, Mattia; et al. (March 2019), "The Hubble Space Telescope UV Legacy Survey of Galactic Globular Clusters. XVIII. Proper-motion Kinematics of Multiple Stellar Populations in the Core Regions of NGC 6352", The Astrophysical Journal, 873 (2): 12, arXiv:1902.02787, Bibcode:2019ApJ...873..109L, doi:10.3847/1538-4357/ab0551, S2CID 119222605, 109.
4. ^ Dunlop, Storm (2005). Atlas of the Night Sky. HarperCollins. ISBN 978-0-00-717223-8.
5. O'Meara, Stephen James (2002). Deep Sky Companions: The Caldwell Objects. Cambridge University Press. p. 324. ISBN 0-521-82796-5.
6. Marks, Michael; Kroupa, Pavel (August 2010), "Initial conditions for globular clusters and assembly of the old globular cluster population of the Milky Way", Monthly Notices of the Royal Astronomical Society, 406 (3): 2000–2012, arXiv:1004.2255, Bibcode:2010MNRAS.406.2000M, doi:10.1111/j.1365-2966.2010.16813.x, S2CID 118652005. Mass is from M_PD on Table 1.
7. ^ Johnston, H. M.; et al. (May 1996), "ROSAT observations of ten globular clusters with large core radii.", Astronomy and Astrophysics, 309: 116–122, Bibcode:1996A&A...309..116J.
8. ^ Forbes, 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, S2CID 51825384.
9. "NGC 6352". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-02-26.
10. Seligman, Courtney. "New General Catalogue objects: NGC 6350 - 6399". cseligman.com. Retrieved 2020-09-20.
11. Fullton, L. K.; et al. (August 1995), "A VIC Color-Magnitude Diagram of the Globular Cluster NGC 6352 From Hubble Space Telescope Planetary Camera Observations", Astronomical Journal, 110: 652, Bibcode:1995AJ....110..652F, doi:10.1086/117552.
12. Wagner-Kaiser, R.; et al. (July 2016). "Bayesian Analysis of Two Stellar Populations in Galactic Globular Clusters. II. NGC 5024, NGC 5272, and NGC 6352". The Astrophysical Journal. 826 (1): 18. arXiv:1604.06074. Bibcode:2016ApJ...826...42W. doi:10.3847/0004-637X/826/1/42. S2CID 119244229. 42.

External links

• Media related to NGC 6352 at Wikimedia Commons

v t e Constellation of Ara
Ara in Chinese astronomy List of stars in Ara
Stars	Bayer α (Choo/Tchou) β γ δ ε ε ζ (Tseen Yin) η θ ι κ λ μ (Cervantes) ν (V539) ν π ρ ρ σ Variable R S OY V626 V821 V828 V829 V854 V862 V872 HR 6177 6187 6207 6236 6251 6253 6297 6300 6312 6323 6408 6416 (41 G.) 6423 6438 6477 6478 6483 6487 6513 6759 HD 152079 153201 154672 154857 156411 (Inquill) Other 2MASS J18082002−5104378 CXOU J164710.2−455216 Gliese 674 Gliese 676 IRAS 16594-4656 SAO 244567 SGR 1627−41 Westerlund 1-20 Westerlund 1 W26 Westerlund 1-75 Westerlund 1-237 Westerlund 1-243 XTE J1650−500
Exoplanets Gliese 674 b HD 154672 b HD 154857 b c HD 156411 b μ Arae b c d e
Star clusters	NGC 6193 6200 6204 6208 6250 6352 6362 6397 Other ESO 280-SC06 IC 4651 Westerlund 1
Nebulae	NGC 6188 6326 Other Stingray Nebula Water Lily Nebula
Galaxies	NGC 6215 6221 6300 6328
Category

• Globular clusters
• Ara (constellation)
• NGC objects
• Caldwell objects