Catalogue and alternative designations NGC 4755, Kappa Crucis, The Jewel Box cluster   Type Open Cluster Position  12 53.6, -60 20 Constellation Crux Camera and Telescope STL11000M and 31.75 cm Ritchey Chretien Focal Ratio F9 Exposure Details RGB =40:40:40 All binned 1x1  Description This object has long been regarded as one of the finest open clusters on the sky and was discovered by Sir John Herschel.