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Messier 73

It was discovered by Charles Messier on October 4, 1780, he thought that the object was a cluster of four stars with some nebulosity. Later observations by John Herschel noted that the designation of M73 as a cluster was debatable. However, Herschel included M73 in the General Catalog of clusters, nebulae and galaxies, and John Dreyer included M73 when compiling the New General Catalog.

File:Messier73 - SDSS DR14.jpg - Wikimedia CommonsHere you can find more information.

This is the photometry that I have obtained from Simbad: