NGC 6352

NGC 6352
Observation data (J2000 epoch)
ClassXI:[1]
ConstellationAra
Right ascension17h 25m 29.11s[2]
Declination–48° 25′ 19.8″[2]
Distance18.3 kly (5.6 kpc)[3]
Apparent magnitude (V)+7.8[4]
Apparent dimensions (V)7.1′[5]
Physical characteristics
Mass3.7×104[6] M☉
Tidal radius10.5″[7]
Metallicity = –0.70[8] dex
Estimated age12.67 Gyr[8]
Other designationsCaldwell 81, Cr 328, NGC 6352[9]
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[3] from the Sun. It was discovered by Scottish astronomer James Dunlop on May 14, 1826.[10] The cluster has a Shapley–Sawyer Concentration Class of XI:.[1] A telescope with a 15 cm (5.9 in) aperture is required to resolve the stars within this loose cluster.[4]

This cluster is about 12.67[8] billion years old with two distinct stellar populations; the second generation is only around 10 million years younger than the first.[3] It lies approximately 13 kly (4 kpc) from the Galactic Center and 1.6 kly (0.5 kpc) from the galactic plane.[11] The orbital motion of this cluster through the Milky Way suggests it is a member of the bulge or disk population.[12] It is relatively metal-rich for an object of this class,[3] having a metallicity of –0.70.[8] The core radius is 49.8″[3] and the tidal radius is 10.5″.[7]

  1. ^ a b Cite error: The named reference hcob849_11 was invoked but never defined (see the help page).
  2. ^ a b Cite error: The named reference aj140_6_1830 was invoked but never defined (see the help page).
  3. ^ a b c d e Cite error: The named reference Libralato2019 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference nightsky was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference OMeara was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference mnras406_3_2000 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference Johnston1996 was invoked but never defined (see the help page).
  8. ^ a b c d Cite error: The named reference mnras404_3_1203 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference cseligman was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Fullton1995 was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference Wagner-Kaiser2016 was invoked but never defined (see the help page).