HDW 2 - The Bearclaw Nebula
Published in Amateur Astrophotography Magazine Issue 69
Astronomy Now Magazine Picture Of The Month December 2019
Published in Amateur Astrophotography Magazine Issue 69
Astronomy Now Magazine Picture Of The Month December 2019
An unusual planetary nebula in the constellation Cassiopeia.
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
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
Pre-processing: CCDStack2
Post-processing: Photoshop CS2