Kronberger 9
Another beautiful, but rarely-imaged likely planetary nebula - this time discovered by Austrian amateur astronomer Matthias Kronberger in 2005.
Embedded in a field of heavy Ha nebulosity it's difficult to separate the PN from the background. The intricate Ha structures contrast with the relatively featureless OIII nebulosity - which questions how much of the intricate structures really are attributable to the PN. However, such structures are only found in the location of the PN, and have a stronger signal than the rest of the field of view - which supports the possibility that they are within the PN itself. This is easier to see in the individual Ha and OIII images below. A clearly-identifiable small blue CSPN is located centrally within the PN - it is catalogued as Lan 21.
Kronberger 9 can be found in many wide-field images of NGC 6823 and Sh2-86.
Embedded in a field of heavy Ha nebulosity it's difficult to separate the PN from the background. The intricate Ha structures contrast with the relatively featureless OIII nebulosity - which questions how much of the intricate structures really are attributable to the PN. However, such structures are only found in the location of the PN, and have a stronger signal than the rest of the field of view - which supports the possibility that they are within the PN itself. This is easier to see in the individual Ha and OIII images below. A clearly-identifiable small blue CSPN is located centrally within the PN - it is catalogued as Lan 21.
Kronberger 9 can be found in many wide-field images of NGC 6823 and Sh2-86.

TARGET
Nomenclature: Kronberger 9, Kn 9
Right Ascension: 19:44:59.0
Declination: +22:45:47.88
Size: 250 arc seconds
Discovery: Mathias Kronberger
EQUIPMENT USED
Twin APM TMB LZOS 152 refractors
10Micron GM2000 HPS mount
Twin QSI6120 CCD cameras
Astrodon filters
IMAGE CAPTURE
OIII 3nm: 98x900" bin 1x1
Ha 5nm: 97x900" bin 1x1
Red: 20x300 bin 1x1
Green: 19x300 bin 1x1
Blue: 20x300 bin 1x1
Total integration: 53 hours 40 minutes
Pixel scale: 0.533 arcsec/pixel
Field radius: 0.367 degrees
Capture dates: 21-28 July 2023
Capture location: Fregenal de la Sierra, Spain
OIII 3nm: 98x900" bin 1x1
Ha 5nm: 97x900" bin 1x1
Red: 20x300 bin 1x1
Green: 19x300 bin 1x1
Blue: 20x300 bin 1x1
Total integration: 53 hours 40 minutes
Pixel scale: 0.533 arcsec/pixel
Field radius: 0.367 degrees
Capture dates: 21-28 July 2023
Capture location: Fregenal de la Sierra, Spain
IMAGE PROCESSING
Pre-processing: CCDStack2
Post-processing: Photoshop CS2
Pre-processing: CCDStack2
Post-processing: Photoshop CS2
Ha image:
OIII image: