NGC 6811
| NGC 6811 | |
|---|---|
| Observation data (2000.0 epoch) | |
| Right ascension | 19h 37m 17s |
| Declination | +46° 23′ 18″ |
| Distance | 3600 ly (1107 pc) |
| Apparent magnitude (V) | 6.8 |
| Apparent dimensions (V) | 13' |
| Physical characteristics | |
| Estimated age | 1.00±0.17 Gyr |
| Other designations | Cr 402 |
| Associations | |
| Constellation | Cygnus |
NGC 6811 is an open cluster in the constellation of Cygnus, near the constellation of Lyra. It has an angular size half that of the full Moon and includes about 1000 stars of roughly similar magnitude. It has also been called "The Hole in the Cluster" or "Hole in a Cluster" because of its dark center.