NGC 6569

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 Credit: NASA/ESA
Observation data (J2000 epoch)
Class	VIII
Constellation	Sagittarius
Right ascension	18^h 13^m 38.88^s[1]
Declination	−31° 49′ 35.2″[1]
Distance	35.5 kly (10.9 kpc)[2]
Apparent magnitude (V)	9.47[1]
Apparent dimensions (V)	7.0′ × 7.0′[2]
Physical characteristics
Metallicity	${\displaystyle {\begin{smallmatrix}\left[{\ce {Fe}}/{\ce {H}}\right]\end{smallmatrix}}}$ = -0.76[3] dex
Other designations	GCl 91, ESO 456-77, VDBH 260[1]

References

1. "NGC 6569". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 13 February 2017.
2. "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.

External links

• Media related to NGC 6569 at Wikimedia Commons