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DWB111 / Propeller Nebula

Classification: Emission Nebula DWB111 / MRSL497 / SIMEIS 57
Constellation: Cygnus (CYG)
Object Location: Ra 20h 16m 40s Dec +43° 43’58° (current)
Size & Distance: Best guess, 15’ x 32’ apx 1500 light-years.

Date & Location: 06-19-2009 Palomar Mountain, CA
Exposure: HaRGB Ha=6 @ 10min. (bin 1x1) RGB 3ea. @ 5min. (bin 2x2)
Optics: Telescope Engineering Company APO140ED @ f/7 F/L 940mm.
Mount: Astro-Physics 900 GTO / ATS 10x36 pier.
Camera: SBIG-ST10XME / Guided by STV 80mm, SBIG-RGH
Filters: Astrodon 6nm Ha, Gen2 RGB
Software: MaxImDL 4.56, Photoshop CS

Notes: Sky conditions: Average seeing, calm winds, low 60’s
Image Field of view is 35 x 52 arc-min.