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 4609
NGC 4609 (also known as Caldwell 98) is an open cluster of stars in the southern constellation of Crux. It was discovered on May 12, 1826 by the Scottish astronomer James Dunlop. The cluster has an apparent visual magnitude of 6.9 and spans an angular size of 6.5′. It is situated beyond the Coalsack Nebula at an estimated distance of 4,500 ly (1,379 pc) from the Sun. This is an intermediate age cluster estimated at 83.2 Myr old. It is a poorly populated cluster with just one red giant member. 33 probable members have been identified, including the variable Be star BZ Crucis. The metallicity of the cluster, as measured by the abundance of iron, is slightly larger than in the Sun.
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Wikipedia Page: NGC 4609
NGC 4609 at In-The-Sky website