NGC 2360, also known as Caroline's Cluster,[3] is an open cluster in the constellation Canis Major. It was discovered on 26 February 1783,[4] by Caroline Herschel who wrote, "A beautiful cluster of pretty compressed stars near 1/2 degree in diameter."[5] Her notes were overlooked until her brother William included the cluster in his 1786 catalogue of 1000 clusters and nebulae and acknowledged her as the discoverer.[4] The cluster lies 3.5 degrees east of Gamma Canis Majoris and less than one degree northwest of the eclipsing binary star R Canis Majoris; it has a combined apparent magnitude of 7.2.[5] It is 13 arc minutes in diameter.[2] By the western edge of the cluster is the unrelated star, 5.5-magnitude HD 56405.[6]