NGC 3198 (UMa)
Technical data: 16"f/8-Hypergraph for Luminance and a 15"f/8 Newtonian for color channels
SBIG ST10XME, CFW8 and AO7
LRGB (L=6x900s; R=4x600s; G=4x600s; B=5x600s; RGB bin2, combined 1,1:0,9:1,6)
Comments: raw FWHM for L-channel ~ 1,9"
There is a double star at the top of the galaxy that shows itīs secret only because there are double spikes visible.
Here is an DDP processed inlay which really shows the double star nature as it can be seen in the raw files:
Authors: Bernd Flach-Wilken & Volker Wendel