Arp 170 is in the class of Diffuse Counter tails. This is a crop of a larger image containing Abell 2572, see:
Taken Sept 21, 22 and 24, 2009. Imaged with CCD Labs Q285M and a C8N at f5 on a Losmandy G11/Gemini
mount. The L subframes were 5 minutes binned 1x1, while the RGB subframes were 3 minuutes binned 1x1
resulting in the following total exposures L:R:G:B (min) = 290:48:48:48. Captured with Nebulosity,
calibrated and sigma combined in Iris with other processing using PixInsight LE and Photoshop CS.
North is up.