Arp 242
British Astronomical Association Picture Of The Week 1 May 2021
Awarded European Astronomy Picture Of the Day 25 May 2021 eapod.org/the-mice-galaxies-peter-goodhew/
ARP 242 - The Mice Galaxies - is a pair of interacting galaxies in the constellation of Coma Berenices about 300 light-years from Earth. They were discovered by William Herschel on March 13, 1785 giving them designation NGC 4676. The northern galaxy is IC 819 and the southern IC 820. I'm intrigued at how the night sky must appear when viewed from within one of these galaxies, with two "milky ways" crossing the sky.
Picture





TARGET
Nomenclature: Arp 242, NGC 4676, IC 819, IC 820
Right Ascension: 12:46:10
Declination: 30:43:35
Discovery: William Herschel on March 13, 1785

EQUIPMENT USED
APM TMB LZOS 152 refractor
10Micron GM2000 HPS mount
QSI6120 CCD camera
Astrodon filters
IMAGE CAPTURE
Luminance: 51x300 bin 1x1
Red: 11x300 bin 1x1
Green: 11x300 bin 1x1
Blue: 11x300 bin 1x1
Total integration: 7 hours
Pixel scale: 0.265 arcsec/pixel
Field radius: 0.091 degrees
Capture dates: 17-18 April 2021
Capture location:  Fregenal de la Sierra, Spain
IMAGE PROCESSING
Pre-processing: CCDStack2
Post-processing: Photoshop CS2