NGC 1261

NGC 1261

NGC 1261
NGC 1261 recorded with the ESO's New Technology Telescope at La Silla, Chile
Observation data (J2000.0 epoch)
Class II[1]
Right ascension 03h 12m 16.21s[2]
Declination –55° 12′ 58.4″[2]
Distance 53.5 kly (16.4 kpc)[3]
Apparent magnitude (V) 8.3
Apparent dimensions (V) 12.9′
Physical characteristics
Mass 3.41×105[4] M
Metallicity –1.08[5] dex
Estimated age 10.24 Gyr[5]
Other designations GCL 5, ESO 155-SC11, Caldwell 87

NGC 1261, also known as Caldwell 87, is a globular cluster in the constellation Horologium, first discovered by James Dunlop in 1826.

References

  1. ^ Shapley, Harlow; Sawyer, Helen B. (August 1927), "A Classification of Globular Clusters", Harvard College Observatory Bulletin (849): 11–14,  
  2. ^ a b 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,  
  3. ^ Paust, Nathaniel E. Q.; et al. (February 2010), "The ACS Survey of Galactic Globular Clusters. VIII. Effects of Environment on Globular Cluster Global Mass Functions", The Astronomical Journal 139 (2): 476–491,  
  4. ^ Boyles, J.; et al. (November 2011), "Young Radio Pulsars in Galactic Globular Clusters", The Astrophysical Journal 742 (1): 51,  
  5. ^ a b Forbes, Duncan A.; Bridges, Terry (May 2010), "Accreted versus in situ Milky Way globular clusters",  

External links

  • NGC 1261 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
  • SEDS
  • NASA data
  • Photometry paper
  • Globular Clusters Database