Date Posted: 3/15/2025
Date Taken: 11/16/2017, 11/19/2017, 11/23/2017, 11/24/2017
Scope: Planewave CDK 12.5 f/8, 2541mm
Camera: SBIG STL-11000 with Astrodon Tru-Balance E-Series Gen2 filters
Temp: -15C
Mount: Losmandy Titan
Guiding: On-axis via ONAG-XM and SX UltraStar at 2541mm; FocusLock real-time focus software.
Exposure: LRGB 205:105:110:90 All subs 5 min. Luminance unbinned, RGB binned 2x2.

Calibrated and Stacked with CCDStack2; RGB combine and DDP with MaximDL. Processed with CS4.

NGC 2841 is an unbarred spiral galaxy about 46 million light years away in Ursa Major. It is considered the prototype of a flocculent galaxy, whose spiral arms are patchy and discontinuous. It has a diameter of about 150,000 light years, making it about 50% larger than our Milky Way. It is an easy capture in small scopes, and is one of the brightest galaxies without either a Messier or Caldwell designation.

This is a minor re-process of an older image, using StarXTerminator and StarShrink to improve the original.