NGC 7243

NGC 7243 (also known as Caldwell 16) is an open cluster and Caldwell object in the constellation Lacerta. It shines at magnitude +6.4. Its celestial coordinates are RA  22h 15.3m, dec +49° 53′. It is located near the naked-eye stars Alpha Lacertae, 4 Lacertae, an A-class double star, and planetary nebula IC 5217. It lies approximately 2,800 light-years away, and is thought to be just over 100 million years old, consisting mainly of white and blue stars.[1]

Map showing location of NGC 7243
NGC 7243
NGC 7243
Observation data (2000.0 epoch)
ConstellationLacerta
Right ascension 22h 15m 08.6s
Declination+49° 53′ 51″
Distance2800 (860)
Apparent magnitude (V)+6.4
Apparent dimensions (V)21′
Physical characteristics
Other designationsCaldwell 16, Cr 448

Notes
  1. "NGC 7243". eSky. Retrieved 2008-08-06.
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References
  • Pasachoff, Jay M. (2000). "Atlas of the Sky". Stars and Planets. New York, NY: Peterson Field Guides. p. 578. ISBN 978-0-395-93432-6.
  • Caldwell-Moore, Sir Patrick (2003). Firefly Atlas of the Universe. Firefly Books Limited. ISBN 978-1-55297-819-1.


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