NGC 189

NGC 189 is an open cluster in the Cassiopeia constellation. It was discovered by Caroline Herschel on 27 September 1783, and independently rediscovered by John Herschel on 27 October 1829.^[3]

NGC 189
NGC 189 from DSS
Observation data (J2000 epoch)
Right ascension	0h 39m 28.8s[1]
Declination	+61° 6m 54s[1]
Distance	4,200 ly (1,300 pc)[1]
Apparent magnitude (V)	8.8[2]
Apparent dimensions (V)	0.120°[1]
Physical characteristics
Estimated age	510 Myr[1]
Other designations	Cr 462, C 0036+608, OCL 301
Associations
Constellation	Cassiopeia
See also: Open cluster, List of open clusters

NGC 189 orbits the Milky Way on a nearly circular orbit with an eccentricity of 0.053 and an orbital period of 231,000 years. It enters the solar circle at parts of its orbit, and is part of the thin disk of the Milky Way.^[4]