Arp 104 - Keenan's System
Arp 104, also known as Keenan's System, is a pair of gravitationally interacting galaxies (NGC 5216 and 5218). It was first noted by William Herschel in 1790. It is located in the constellation Ursa Major at a distance of about 17 million light-years from Earth. The connecting string of gas, dust and stars between the galaxies is about 22,000 light-years long. Also in this field of view is a large collection of other small and medium galaxies.
TARGET
Nomenclature: Arp 104, Keenan's System, NGC 5216, NGC 5218, NGC 5205
Right Ascension: 13:31:10
Declination: +62:40:37
EQUIPMENT USED
APM TMB LZOS 152 refractor
10Micron GM2000 HPS mount
QSI6120 CCD camera
Astrodon filters
IMAGE CAPTURE
Luminance: 81x600 bin 1x1
Red: 18x300 bin 1x1
Green: 17x300 bin 1x1
Blue: 16x300 bin 1x1
Total integration: 17.8 hours
Pixel scale: 0.533 arcsec/pixel
Field radius: 0.372 degrees
Capture dates: 28 April - 1 May 2020
Capture location: Fregenal de la Sierra, Spain
Luminance: 81x600 bin 1x1
Red: 18x300 bin 1x1
Green: 17x300 bin 1x1
Blue: 16x300 bin 1x1
Total integration: 17.8 hours
Pixel scale: 0.533 arcsec/pixel
Field radius: 0.372 degrees
Capture dates: 28 April - 1 May 2020
Capture location: Fregenal de la Sierra, Spain
IMAGE PROCESSING
Pre-processing: CCDStack2
Post-processing: Photoshop CS2
Pre-processing: CCDStack2
Post-processing: Photoshop CS2