Abell 84
British Astronomical Association Image Of The Week 21 November 2020
APOD GrAG Astronomical Photo Of The Day 30 October 2020 apod.grag.org/2020/12/15/abell-84/
Published in Universo Magico 25 December 2020 www.universomágico.com/2020/12/abell-84-por-peter-goodhew.html
Abell 84 is a faint planetary nebula in the constellation Cassiopeia. It is rarely imaged - I'm baffled as to why. This was an experiment to see how much structural detail I could tease out of this target as I couldn't find much in other online images. All data capture was done around full moon. I went deep to get good quality data despite the lunar presence and used drizzle x2 for the first time to increase image resolution.
TARGET
Nomenclature: Abell 84
Right Ascension: 23:47:41
Declination:  +51:23:54
Size: 146x116 arc sec
Discovery: George Abell in 1955
EQUIPMENT USED
Twin APM TMB LZOS 152 refractors
10Micron GM2000 HPS mount
Twin QSI6120 CCD cameras
Astrodon filters
IMAGE CAPTURE
Blue: 7x300"
Green: 8x300"
Lum: 9x300"
Red: 9x300"
Ha: 127x900" bin 1x1
OIII 93x900" bin 1x1
Total Integration: 57.8 hours
Pixel scale: 0.267 arcsec/pixel
Field radius: 0.189 degrees
Capture dates: 28 October  - 4 November
Capture location:  Fregenal de la Sierra, Spain

IMAGE PROCESSING
Pre-processing: CCDStack2
Post-processing: Photoshop CS2
Ha image
OIII image