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 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.^[1]

Map showing location of NGC 7243

NGC 7243
NGC 7243
Observation data (2000.0 epoch)
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, Cr 448
Associations
Constellation	Lacerta
See also: Open cluster, List of open clusters