NGC 6642

NGC 6642 is a globular cluster located 26,400 light years from Earth in the constellation Sagittarius. Many "blue stragglers" (stars which seemingly lag behind in their rate of aging) have been spotted in this globular, and it is known to be lacking in low-mass stars.[3]

NGC 6642
Image of NGC 6642 was created from visible and infrared images taken with the Wide Field Channel of the Advanced Camera for Surveys.
Credit: ESA/Hubble & NASA
Observation data (J2000 epoch)
ConstellationSagittarius
Right ascension18h 31m 54.23s[1]
Declination−23° 28 34.1
Distance26.4 kly (8.1 kpc)[2]
Apparent dimensions (V)48"
Physical characteristics
Mass1.09×105[2] M
Metallicity = –1.26[2] dex
Other designationsCr 381, C 1828-235, ESO 522-32, GCl 97, Mel 203

References

  1. "SIMBAD query results". SIMBAD Astronomical Database. Retrieved 6 February 2012.
  2. Boyles, J.; et al. (November 2011), "Young Radio Pulsars in Galactic Globular Clusters", The Astrophysical Journal, 742 (1): 51, arXiv:1108.4402, Bibcode:2011ApJ...742...51B, doi:10.1088/0004-637X/742/1/51.
  3. Balbinot, E.; Santiago, B. X.; Bica, E.; Bonatto, C. (1 July 2009). "The globular cluster NGC 6642: evidence for a depleted mass function in a very old cluster". Monthly Notices of the Royal Astronomical Society. 396 (3): 1596–1602. arXiv:0903.4325. Bibcode:2009MNRAS.396.1596B. doi:10.1111/j.1365-2966.2009.14819.x.
  • Media related to NGC 6642 at Wikimedia Commons

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