NGC 6528
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.[2] Dreyer described it as "pF, cS, R", meaning poor and faint, considerably small and round.
| NGC 6528 | |
|---|---|
 The globular cluster NGC 6528 Credit: HST | |
| Observation data (J2000 epoch) | |
| Class | V |
| Constellation | Sagittarius |
| Right ascension | 18h 04m 49.61s[1] |
| Declination | −30° 03′ 20.8″[1] |
| Distance | 25.8 kly (7.9 kpc)[1] |
| Apparent magnitude (V) | 10.65[1] |
| Physical characteristics | |
| Radius | 8.3' x 8.3'[2] |
| Metallicity | = -0.11[3] dex |
| Other designations | GCl 84, ESO 456-48, VDBH 257[1] |
NGC 6528 is located southwest of NGC 6522, another globular cluster. Both are located in Baade's Window, a relatively clear area near the galactic equator.
The globular cluster was discovered in 1784 by the astronomer William Herschel with his 18-inch telescopes.
Gallery
The globular cluster NGC 6528 (lower left) is close to NGC 6522 (upper right)
The cluster is located in Baade's Window, a region of night sky that is not clouded by dust from the Milky Way.
References
- "NGC 6528". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 8 January 2017.
- "NGC 6528". Retrieved 8 January 2016.
- "A Galactic Globular Clusters Database: NGC 6528". Retrieved 8 January 2017.
- Robert Burnham, Jr, Burnham's Celestial Handbook: An observer's guide to the universe beyond the solar system, vol 3, p.1555
- NGC 6528 @ SEDS
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