NGC 6569 is a globular cluster in the constellation Sagittarius. It has an apparent magnitude of about 9.5,[1] and an apparent diameter of 7 arc minutes, and class VIII with stars of magnitude 15 and dimmer.[2] It is about 2 degrees south east of Gamma2 Sagittarii. The globular cluster was discovered in 1784 by the astronomer William Herschel with his 18.7-inch telescope and was catalogued later in the New General Catalogue.[4]

NGC 6569
Hubble Space Telescope image of NGC 6569
Observation data (J2000 epoch)
ClassVIII
ConstellationSagittarius
Right ascension18h 13m 38.88s[1]
Declination−31° 49′ 35.2″[1]
Distance35.5 kly (10.9 kpc)[2]
Apparent magnitude (V)9.47[1]
Apparent dimensions (V)7.0 × 7.0[2]
Physical characteristics
Metallicity = -0.76[3] dex
Other designationsGCl 91, ESO 456-77, VDBH 260[1]
See also: Globular cluster, List of globular clusters

References

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  1. ^ a b c d e "NGC 6569". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 13 February 2017.
  2. ^ a b c "NGC 5634". Retrieved 7 January 2016.
  3. ^ William E. Harris. "Catalog of Parameters for Milky Way Globular Clusters". Retrieved 13 February 2017.
  4. ^ Courtney Seligman. "New General Catalog Objects: NGC 6550 - 6599". Retrieved 13 February 2017.
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