PM1-320 is a small planetary nebula in Cygnus, close to DWB 111, the Propeller Nebula.
It was discovered by Andrea Preite-Martinez in the 1980s.
I believe this to be the first deep high-resolution image of PM1-320.
The outer parts of the nebulosity are very faint, hence 56 hours of OIII integration.
HASH records it's size as 60 arc seconds.

TARGET
Nomenclature: PM1-320
Right Ascension: 20:10:33.6
Declination: +44:11:48.48
Size: 60.0 arc sec
Discovery: Andrea Preite-Martinez
EQUIPMENT USED
Twin APM TMB LZOS 152 refractors
10Micron GM2000 HPS mount
Twin QSI6120 CCD cameras
Astrodon filters

IMAGE CAPTURE
Blue: 10x300"
Green: 10x300"
Lum: 15x300"
Red: 10x300"
Ha: 103x900" bin 1x1
OIII: 226x900 bn 1x1
Total Integration: 86 hours
Pixel scale: 0.265 arcsec/pixel
Field radius: 0.368 degrees
Capture dates: 20 August-3 September 2021
Capture location: Fregenal de la Sierra, Spain

IMAGE PROCESSING
Pre-processing: CCDStack2
Post-processing: Photoshop CS2

Copyright: Peter Goodhew