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Catalogue and alternative designations NGC 4755, Jewel Box cluster, Kappa Crucis


Type Open Cluster 
Position 12 53.6, -60 20
Constellation Crux
Camera and Telescope STXL16200 and 36.8 cm Ritchey Chretien
Focal Ratio F9
Exposure Details LRGB image using Astrodon series 2 filters with  L=R=G=B=50 minutes. All unbinned
Description This object has long been regarded as one of the finest open clusters on the sky and was discovered by Lacaille although it was sir John Herschel who gave it the Jewel Box name.  NGC 4755 is about 10' across and easily visible with binoculars near the star Beta Crucis.  The distance is about 6400 light years.