NGC 6811

NGC 6811
Observation data (2000.0 epoch)
Right ascension19h 37m 17s[1]
Declination+46° 23′ 18″
Distance3600 ly[2] (1107 pc[2])
Apparent magnitude (V)6.8
Apparent dimensions (V)13'
Physical characteristics
Estimated age1.00±0.17 Gyr
Other designationsCr 402
Associations
ConstellationCygnus
See also: Open cluster, List of open clusters

NGC 6811 is an open cluster in the constellation of Cygnus,[3] near the constellation of Lyra.[4] It has an angular size half that of the full Moon and includes about 1000 stars[5] of roughly similar magnitude.[3][6] It has also been called "The Hole in the Cluster" or "Hole in a Cluster"[7] because of its dark center.[6][8]

  1. ^ "NGC 6811". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 11 May 2013.
  2. ^ a b Cite error: The named reference Meibom2013 was invoked but never defined (see the help page).
  3. ^ a b Ayiomamitis, Anthony. "NGC 6811". Astronomy Magazine. Kalmach Publishing Co. Retrieved 9 July 2013.
  4. ^ Meibom, S. R.; Barnes, S. A.; Latham, D. W.; Batalha, N.; Borucki, W. J.; Koch, D. G.; Basri, Gibor; Walkowicz, L. M.; Janes, K. A.; Jenkins, J.; Van Cleve, J.; Haas, M. R.; Bryson, S. T.; Dupree, A. K.; Furesz, G.; Szentgyorgyi, A. H.; Buchhave, L. A.; Clarke, B. D.; Twicken, J. D.; Quintana, E. V. (2011). "The Kepler Cluster Study: Stellar Rotation in Ngc 6811". The Astrophysical Journal. 733 (1): L9. arXiv:1104.2912. Bibcode:2011ApJ...733L...9M. doi:10.1088/2041-8205/733/1/L9. S2CID 118585956.
  5. ^ Balouchi, Shari. "Crowded Clusters Can Host Planets, Too". Sky and Telescope. Archived from the original on 10 July 2013. Retrieved 9 July 2013.
  6. ^ a b Stephen James O'Meara (30 June 2011). Deep-Sky Companions: The Secret Deep. Cambridge University Press. pp. 389–. ISBN 978-1-139-50007-4. Retrieved 9 July 2013.
  7. ^ Stoyan, Ronald; Schurig, Stephan (2014). interstellarum Deep Sky Atlas. Erlangen: Cambridge University Press; Oculum-Verlag GmbH. ISBN 978-1-107-50338-0. OCLC 920437579.
  8. ^ L. Phil Simpson (2012). Guidebook to the Constellations. Springer. pp. 505–. ISBN 978-1-4419-6941-5. Retrieved 9 July 2013.