Kn 121
An extremely faint planetary nebula in the constellation Delphinus. It has an unusual morphology as a result of heavy interaction with the interstellar medium. It was discovered by Austrian amateur astronomer Matthias Kronberger. It is also known as the Delphinus Diamond.
TARGET
Nomenclature: Kn 121, Kronberger 121, Delphinus Diamond
Right Ascension: 20:42:01.9
Declination:  +13:51:15
Size: 486x371 arc sec
Discovery: Matthias Kronberger
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: 12x300"
Red: 11x300"
OIII: 106x900 bin 1x1
Total Integration: 30 hours
Pixel scale: 0.530 arcsec/pixel
Field radius: 0.345 degrees
Capture dates: 10 September - 7 October 2021
Capture location:  Fregenal de la Sierra, Spain

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