NGC 2857 or Arp 1, spiral galaxy type Sc in Ursa Major. Arp 1 is in the class of Low Surface
Brightness Spirals. Taken in average to poor seeing and transparency on March 12, 13, 19,
23,24 and Mar 27 2009 with CCD Lab’s Q285M and a C8N at f5 on a Losmandy G11/Gemini mount.
This is a crop of a larger image containing Arp 1 and Arp 285 see:
All subframes were 5 minutes binned 1x1 resulting in the following total exposures L:R:G:B (min) =
305:75:75:75. Captured with Nebulosity, calibrated and sigma combined in Iris with other processing
using PixInsight LE and Photoshop CS. North is up.