Kn26
Kn26 is a small (110 arc seconds) planetary nebula in the constellation Cygnus. It lies very close to the relatively giant Flying Dragon Nebula (Sharpless-114) part of which can be seen to the right of the image.
Kn26 was discovered by Austrian amateur astronomer Matthias Kronberger in 2006, although it wasn't spectroscopically confirmed as a planetary nebula until 2011.
In 2012 it was established that it was a new member of the very small sub-class of quadupolar planetary nebulae (www.aanda.org/articles/aa/pdf/2013/03/aa20592-12.pdf).
Almost all of the structural detail is found in the Ha emission. 12 hours of OIII data only revealed the central core with no structural detail.
TARGET
Nomenclature: Kn26, Kronberger 26
Right Ascension: 21:23:09.4
Declination:  +38:58:13.08
Size: 110.0 arc sec
Discovery: Matthias Kronberger in 2006
EQUIPMENT USED
Twin APM TMB LZOS 152 refractors
10Micron GM2000 HPS mount
Twin QSI6120 CCD cameras
Astrodon filters
IMAGE CAPTURE
Blue: 12x300"
Green: 12x300"
Lum: 10x300"
Red: 9x300"
Ha: 44x900" bin 1x1
OIII: 47x900 bn 1x1
Total Integration: 26 hours 20 minutes
Pixel scale: 0.265 arcsec/pixel
Field radius: 0.104 degrees
Capture dates: 12-20 August 2021
Capture location:  Fregenal de la Sierra, Spain

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