A Short M51 (Jan. & Feb. 2013)

 Full resolution image here.

How many images of M51 can a fellow have?  This was taken while I still had night left after my real target had set behind the trees.  Size reduced a bit to handle noise in the background.

Telescope: Astro-Tech AT111EDT and William Optics AFR-IV (eff. at f/5.6)
Camera and Exposure: SXVF-H9 (23x480"), Alnitak Flat-man flats
Filter: Astronomik CLS
Guiding: SX Lodestar and SX OAG
Mount: Takahashi NJP
Software: Nebulosity, Maxim DL, Photoshop CS3
Location: The Woodlands, TX