Kohoutek 1-17
A planetary nebula discovered by the Czech astronomer Dr. Luboš Kohoutek in 1963. It was discvoered by visual examination of National Geographic Society-Palomar Observatory Sky Survey prints.
It is registered on the HASH database as having a size of 56 arc seconds but this deep image reveals outer extensions giving it a true size of 2 arc minutes. These outer extensions around this planetary nebula were initially discovered by the Galactic Planetary Nebula Halo Survey (GPNHS) team in December 2019.
This was a collaboration with my great friend Sven Eklund.
Picture





TARGET
Nomenclature:  Kohoutek 1-17, K 1-17, PNG 051.5+06.1
Right Ascension: 19:03:37.4
Declination: +19:21:22.61
Size: 56 arc seconds (core), 2 arc minutes with extensions.
Discovery: Dr. Luboš Kohoutek

EQUIPMENT USED
Twin APM TMB LZOS 152 refractors, Celestron C14 Edge HD
10Micron GM2000 HPS mount and 10Micron GM3000 HPS mount
Twin QSI6120 CCD cameras, AZO ASI6200MM Pro cameras
Astrodon filters
IMAGE CAPTURE
OIII 3nm: 88x900 bin 1x1
OIII 4nm: 270x120" bin 1x1
Ha: 57x900 bin 1x1
Red: 15x300 bin 1x1
Green: 15x300 bin 1x1
Blue: 14x300 bin 1x1
Total integration: 48 hours 55 minutes
Pixel scale: 0.533 arcsec/pixel
Field radius: 0.156 degrees
Capture dates: 13-17 July 2023
Capture location:  Fregenal de la Sierra, Spain
IMAGE PROCESSING
Pre-processing: CCDStack2, Pixinsight
Post-processing: Photoshop CS2
Ha image:
OIII image: