HDW 2 - The Bearclaw Nebula
Published in Amateur Astrophotography Magazine Issue 69
Astronomy Now Magazine Picture Of The Month December 2019
An unusual planetary nebula in the constellation Cassiopeia.
Picture





TARGET
Nomenclature:  HDW 2, Hartl-Dengel-Weinberger 2, Sh2-200, Sharpless 200, PN G138.1+04.1
Right Ascension: 03:11:01.32
Declination: +62:47:45.1
Size: 9 arc min
Discovery: Stewart Sharpless in 1959, but found to be a planetary nebula by H Hartl, J Dengel, R Weinberger in 1983

EQUIPMENT USED
Twin APM TMB LZOS 152 refractors
10Micron GM2000 HPS mount
Twin QSI6120 CCD cameras
Astrodon filters
IMAGE CAPTURE
5nm Ha: 62x1800 bin 1x1
3nm OIII: 37x1800 bin 1x1
Luminance: 37x600 bin 1x1
Red: 20x300 bin 1x1
Green: 10x300 bin 1x1 + 10x600 bin 1x1
Blue: 20x300 bin 1x1
Total integration: 61.5 hours
Pixel scale: 0.533 arcsec/pixel
Field radius: 0.339 degrees
Capture dates: 12-26 September 2019
Capture location:  Fregenal de la Sierra, Spain
IMAGE PROCESSING
Pre-processing: CCDStack2
Post-processing: Photoshop CS2