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 2240
NGC 2240 is an open cluster in the constellation Auriga. It was discovered by William Herschel on January 3, 1786, and is located about 5.1 thousand light-years away.
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Wikipedia Page: NGC 2240
NGC 2240 at In-The-Sky website