Abell 79
Awarded Astronomical Picture of the Day by astronomia.com apod.astronomia.com/2021/09/12/abell-79/
Awarded Astronomical Photo of the Day by APODGrAG apod.grag.org/2021/09/13/abell-79/
Abell 79 is a bright unusual planetary nebula in the constellation Lacerta. It is small (59 arc seconds) but with an assymetrical morphology which results in it being named "The 6 Nebula". The Ha signal is much stronger than the OIII signal, and with a more intricate structure. Some estimates put it's distance at 11, 360 light years, whereas other estimates are 5,900 light years.
It was originally discovered in 1947 by Rudolf Minkowski, although he didn't realise that it was a planetary nebula (presumably because of the lack of obvious OIII signal). Subsequently George Abell classified it as a planetary nebula in his 1955 catalog.
Superresolution techniques (also known as drizzle) were used to capture the maximum detail in this small object.
TARGET
Nomenclature: Abell 79, The 6 Nebula
Right Ascension: 22:26:17.3
Declination:  +54:49:38.06
Size: 59.0 arc sec
Discovery: Rudolf Minkowski in 1947
EQUIPMENT USED
Twin APM TMB LZOS 152 refractors
10Micron GM2000 HPS mount
Twin QSI6120 CCD cameras
Astrodon filters
IMAGE CAPTURE
Blue: 10x300"
Green: 11x300"
Lum: 26x300"
Red: 12x300"
Ha: 98x300" bin 1x1
OIII: 54x300 bn 1x1
Total Integration: 17 hours 35 minutes
Pixel scale: 0.265 arcsec/pixel
Field radius: 0.097 degrees
Capture dates: 23-31 July 2021
Capture location:  Fregenal de la Sierra, Spain

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