NGC 6556
| Asterism | |
|---|---|
| NGC 6556 | |
| Constellation | Sagittarius |
|
Position equinox : J2000.0 |
|
| Right ascension | 18h 09m 57.6s |
| declination | -27 ° 31 ′ 29 ″ |
| Further data | |
| history | |
| discovery |
John Herschel |
| Date of discovery |
July 15, 1836 |
| Catalog names | |
| NGC 6556 • ESO 456-61 • GC 4380 • h 3732 | |
| Aladin previewer | |
NGC 6556 is one of several stars of existing asterism in the constellation Sagittarius . During an observation with an 18-inch reflector telescope on July 15, 1836, John Herschel noted “Cluster VI. An oval patch comprised within limits of the field, barely resolvable into infinitely minute points, but which, without attention, appears as a great neb 15 ′ long, 12 ′ broad; hardly bM “. He mistakenly believed this observation to be a star cluster that had such an entry in the catalog.
Web links
- NGC 6556. DSO Browser, accessed September 15, 2016 .