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Catalogue and alternative designations E3, ESO 37-1


Type Globular Cluster 
Position 09 20 59, -77 16 57
Constellation Chamaeleon
Camera and Telescope STXL6303 and 36.8 cm RCOS Ritchey Chretien 
Focal Ratio F9
Exposure Details LRGB image using Astrodon filters.  L=165 minutes, R=G=B=180 minutes. All unbinned
Description Discovered in 1976, E 3 is one of the strangest globular clusters in the milky way and has been called a "dying" globular cluster because it is thought that many of its stars are being stripped away by tidal action.  It was for a long time thought to be an open cluster but is now definitely identified as a globular.  With a magnitude of 11.4 it is a fairly faint object.

The E 3 stellar system is certainly one of the most intriguing globular clusters in the Galaxy. Its old age and high metallicity is a peculiar combination, only seen in a handful of objects like the far more conspicuous NGC 104 (47 Tucanae) that may share a stellar stream with it.