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Catalogue and alternative designations IC 5148/50, Spare tyre nebula


Type Planetary Nebula 
Position 21 59.5, -39 23
Constellation Grus
Camera and Telescope STXL6303E and 36.8 cm Ritchey Chretien
Focal Ratio F9
Exposure Details LRGB 300:150:150:150 all 1x1 with Astrodon filters.  The halo required 18.5 hours of OIII blended into the blue and green
Description This seldom imaged planetary nebula is about 2' across and magnitude 11.5.  It was discovered by Gale in 1894 and independently by Swift three years later.  Dreyer recorded both observations, hence the dual designation.  The estimated distance is about 2900 light years.

The halo was only discovered in 2012 and confirmed in 2013.