IC 4991
| Unknown | |
|---|---|
| IC 4991 | |
| Constellation | Sagittarius |
|
Position equinox : J2000.0 |
|
| Right ascension | 20h 17m 45.2s |
| declination | -41 ° 34 ′ 57 ″ |
| Further data | |
| history | |
| discovery |
Lewis Swift |
| Date of discovery |
September 23, 1897 |
| Catalog names | |
| IC 4991 • | |
| Aladin previewer | |
IC 4991 is a non-existent object which the astronomer Lewis Swift erroneously described as an IC object on September 23, 1897.