Abell 12, Magnitude 12.4 Planetary Nebula in Orion.
Often called the "Hidden Nebula" because it is very difficult to observe and image due to its proximity to Mag 4 star, Mu Orionis

Imaging Camera: QSI540 wsg
Imaging Scope: 9.25" Celestron edge at F/10
Guide Camera: SX Lodestar x 2, PHD2
Mount:Avalon M Uno
Filters: Astrodon
Exposure: 10 minute subs. 2.5 hours 5nm OIII and 2.5 hours 5nm Ha, binned X2
3 minute subs. 1 hour each LRGB unbinned
Processing: CCD Stack and PS CC.
Date: 1/6/16, 1/11/16 Reprocessed with additional data 4/4/21
Location: My front driveway. Morristown, NJ

Published in Sky&Telescope Magazine. January 2022 Issue, p.22