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Catalogue and alternative designations IC 4642, Shapley 2, ESO 180-4


Type Planetary nebula 
Position  17 11 44, - 55 24 02
Constellation Ara
Camera and Telescope STXL16200 and 36.8cm Ritchey Chretien
Focal Ratio F9
Exposure Details LRGB colorised with Hydrogen Alpha and Oxygen III.  Luminance = 130 minutes, R=G=B=20 minutes. Hydrogen Alpha = 180 minutes, OIII = 300 minutes with Astrodon series 2 filters.  Luminance unbinned, colours binned 2x2
Description Shapley 2 is one of the three planetary nebulae in the Shapley catalogue.  It has a photographic magnitude of 13.4 and is about 24" in diameter although there are some outer OIII structures visible.  The central star is magnitude 16.

The possible outer halo around this planetary nebula was discovered by the Galactic Planetary Nebula Halo Survey (GPNHS) team in July 2015 and possible OIII blobs in June 2017.