This large and complex Planetary Nebula at magnitude 12,5 extends to 2,5 arc-min. It was discovered by A. J. Longmore on a UK Schmidt plate in 1976.
It is showing an extremely faint circular Halo in the O-III band.
The outer halo around this planetary nebula was discovered by the Galactic Planetary Nebula Halo Survey (GPNHS) team in March 2014.
Ha-OIII-RGB (320-320-100-100-120min), total 16 h, Seeing 0.8-1.2 arcsec, North is up;
80cm f/7 Astrooptik Keller corrected cassegrain, FLI Proline 16803, Astrodon Gen2 filters, Prompt 7 CTIO Chile
Processing: Johannes Schedler
Find the combined image below in 35/100 % size and also a H-alpha - O-III comparison in 50 % size.