Object: Galaxy  M101 in Ursa Major
Date: April 19, 2003
Equipment: WO FLT110 at F/6.5, HX916 CCD, G11 mount, ST-4
Exposure: LRGB 120:30:30:30 minutes. Composite exposure, RGB frames were acquired on a different night.
Processing: Photoshop (no flats or darks applied to the Luminance)
Comments: Clouds rolled in after the L frame was acquired, ruining the RGB frames. To save the exposure, an older set of RGB frames taken at lower resolution were combined with the new luminance.

Copyright © 2002,03 Paul Kanevsky