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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: 09-18/19-2015 Palomar Mountain, CA.
Exposure: Hubble Palette SHO, 180, 180, 300 @ 15min. Subs, (bin 1x1)
Optics: Telescope Engineering Company APO110FL @ f/5.74, 631mm.
Mount: Astro-Physics 1200 GTO / ATS 10x36 pier.
Camera: FLI-ML6303 @-20c / CFW2-7 / / Guided by SBIG ST-I / w OAG.
Filters: Astrodon 3nm Sll, Ha, Olll
Software: MaxImDL 6.09, Photoshop CS5, CCDStack 2 Topaz Labs.

Notes: Sky conditions: Above average seeing, Calm wind, Temp 69°
Image Field of view is 100.6 x 151arcmin.
This image was an Astronomy Magazine Picture Of The Day. Nov, 2015

The Propeller nebula (DWB111) is an HII emission nebula in Cygnus. It’s part of a giant molecular cloud known as the Cygnus X region.
Cygnus-X is one of the richest known regions of star formation in the Galaxy. It contains as many as 800 distinct HII regions, a number of Wolf-Rayet and O3 stars and several OB associations.