NGC 6840
| Asterism | |
|---|---|
| NGC 6840 | |
| Constellation | Eagle |
|
Position equinox : J2000.0 |
|
| Right ascension | 19h 55m 16.2s |
| declination | + 12 ° 06 ′ 53 ″ |
| Further data | |
| Angular expansion |
4.0 ' |
| distance |
6400 ly (1970 pc) |
| history | |
| discovery |
Wilhelm Herschel |
| Date of discovery |
September 4, 1784 |
| Catalog names | |
| NGC 6839 • h 2058 • GC 4522 • H VIII 19 | |
| Aladin previewer | |
NGC 6840 is an asterism in the constellation Aquila . It was discovered by Wilhelm Herschel on September 4, 1784 .
Individual evidence
- ↑ NASA / IPAC EXTRAGALACTIC DATABASE
- ↑ SEDS : NGC 6840
- ↑ AL Tadross: A catalog of 120 NGC open star cluster . In: Journal of the Korean Astronomical Society , 44, 2011, pp. 1-11. doi: 10.5303 / JKAS.2011.44.1.1 .
- ↑ Seligman