NGC 6528

NGC 6528
The globular cluster NGC 6528 Credit: HST
Observation data (J2000 epoch)
Class	V
Constellation	Sagittarius
Right ascension	18h 04m 49.61s
Declination	−30° 03′ 20.8″
Distance	25.8 kly (7.9 kpc)
Apparent magnitude (V)	10.65
Physical characteristics
Radius	8.3' x 8.3'
Metallicity	${\displaystyle {\begin{smallmatrix}\left[{\ce {Fe}}/{\ce {H}}\right]\end{smallmatrix}}}$ = -0.11dex
Other designations	GCl 84, ESO 456-48, VDBH 257
See also: Globular cluster, List of globular clusters

NGC 6528 is a globular cluster in the constellation Sagittarius, and is listed in the New General Catalogue. It has an apparent magnitude of about 11 and a diameter of about 16 arcminutes, and its Shapley-Sawyer Concentration Class is V, containing stars of 16th magnitude and dimmer. Dreyer described it as "pF, cS, R", meaning poor and faint, considerably small and round.

NGC 6528 is located southwest of NGC 6522, another globular cluster. Both are located in Baade's Window, a relatively clear area in the galactic equator.

The globular cluster was discovered in 1784 by the astronomer William Herschel with his 18-inch telescopes.

The globular clusters NGC 6528 (lower left) is close to NGC 6522 (upper right)

It is located in the Baade's Window, a view is not clouded by dust from the Milky Way.