K 1-16

Kohoutek 1-16 (K 1-16) is a planetary nebula in the constellation Draco. It has very low surface brightness, and is around 7,000 light year from Earth.
It's central progenitor star is a very hot (over 80,000 K) pulsating variable white dwarf called DS Dra. The dominant pulsating period is 28.3 minutes.
The nebula has a diameter of 1.6 arcmin.
Immediately below, and very slightly offset to the left of K1-16 is a bright (14th mag) blue star which is quasar KUV 18217+6419, one of the brightest objects of this type in the sky. It is around 3.4 billion light years away.
TARGET
Nomenclature: K 1-16, Kohoutek 1-16
Right Ascension: 18:21:52.11
Declination:  +64.21.53.40
Size: 123 arc seconds
EQUIPMENT USED
Twin APM TMB LZOS 152 refractors
10Micron GM2000 HPS mount
Twin QSI6120 CCD cameras
Astrodon filters
IMAGE CAPTURE
Blue: 12x300"
Green: 12x300"
Red: 10x300"
Ha: 132x900" bin 1x1
OIII: 64x900" bin 1x1
Total Integration: 51 hours 55 minutes
Pixel scale: 0.266 arcsec/pixel
Field radius: 0.188 degrees
Capture dates: 6 March - 19 April 2022
Capture location:  Fregenal de la Sierra, Spain

IMAGE PROCESSING:
CCDStack2 and Photoshop CS2
Ha image
OIII image