NGC 6811 [SEP] constellation
NGC 6811
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" because of its dark center.
Features.
NGC 6811 lies far away from the galactic plane, a feature it shares with many other old open clusters. It is 1107 ± 90 parsecs distant, 14–20 light years across,
variables are too old to be associated with open clusters, and are instead found in globular clusters.
Planets.
The open cluster NGC 6811 contains two known planetary systems Kepler 66 and Kepler 67.
See also.
- List of open clusters
- Moving groups
- Open cluster family
- Open cluster remnant
External links.
- The Jewel Box (also known as NGC 4755 or Kappa Crucis Cluster) – open cluster in the Crux constellation @ SKY-MAP.ORG
- Open Star Clusters @