Arp 178

Posted by dcrowson
on Thursday, April 11, 2019

Arp 178 consists of NGC 5614 (UGC 9226, VV 77a and others), what looks like a shell galaxy at the center, NGC 5615 (VV 77b and others), the irregular galaxy to the northwest in the shell and NGC 5613 (UGC 9228, VV 77c and others), the strange, double-ring galaxy above the others. These are in Arp’s ‘Galaxies – Narrow Counter-Tails’ class. NGC 5614 and 5615 are located approximately 190 million light-years away so they are definitely interacting but 5613 is double the distance so just close in the way we view it. All of these are located in Boötes.

Luminance – 28x600s – 280 minutes – binned 1x1
RGB – 8x300s – 40 minutes each – binned 2x2

400 minutes total exposure – 6 hours 40 minutes

Imaged over six nights in 2018 and 2019, 2018 from Dark Sky New Mexico at Rancho Hidalgo (Animas, New Mexico) with a SBIG STF-8300M on an Astro-Tech AT12RCT at f/8 2432mm.


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