NGC 4815 is an open cluster in the constellation Musca.

Carraro and Ortolani determined the age of the cluster to be 500 million years, based on BV photometry, which is nearly the same as the Hyades,[5] while Sagar et al. determined its age at 400±50 million years[6] and Kharchenko et al. at 400 million years.

[3] Friel at al. estimated its age to be between 500 and 630 million years.

One of the stars in the cluster region shows extremely red colour along with blue ultraviolet colour and it could be an interacting binary star.

[7] The members show small dispersions in abundance, with the exception of Mg, which is common for clusters of rather low mass, as NGC 4815.