NGC 7243

NGC 7243
Observation data (2000.0 epoch)
Constellation	Lacerta
Right ascension	22h 15m 08.6s
Declination	+49° 53′ 51″
Distance	2800 (860)
Apparent magnitude (V)	+6.4
Apparent dimensions (V)	21′
Physical characteristics
Other designations	Caldwell 16
See also: Open cluster, List of open clusters

NGC 7243, also Caldwell 16, is an open cluster and Caldwell object in the constellation Lacerta. It shines at magnitude +6.4. Its celestial coordinates are RA 22^h 15.3^m, 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.

References

• Pasachoff, Jay M. (2000). "Atlas of the Sky" (in English). Stars and Planets. New York, NY: Peterson Field Guides. pp. 578 pg. ISBN 0-395-93432-X. 
• Caldwell-Moore, Sir Patrick (2003) (in English). Firefly Atlas of the Universe. Firefly Books Limited. ISBN 1-55297-819-2. 

External links

• SEDS – NGC 7243
• Simbad – NGC 7243
• VizieR – NGC 7243
• NED – NGC 7243
• NGC 7243 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images