The New General Catalogue of Nebulae and Clusters of Stars (abbreviated as NGC) is a catalogue of deep-sky objects compiled by John Louis Emil Dreyer in 1888. The NGC contains 7,840 objects, known as the NGC objects. It is one of the largest comprehensive catalogues, as it includes all types of deep space objects, including galaxies, star clusters, emission nebulae and absorption nebulae.
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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. 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.
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Wikipedia Page: NGC 189
NGC 189 at In-The-Sky website