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 6605
NGC 6605 is an open cluster located in the constellation Serpens. It was discovered by the British astronomer John Herschel in 1826.
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Sources:
Wikipedia Page: NGC 6605
NGC 6605 at In-The-Sky website