Imaging telescope or lens: William Optics Star 71
Imaging camera: SBIG STF-8300M
Mount: Orion HDX110
Guiding telescope or lens: William Optics Star 71
Guiding camera: QHY5L-II Mono
Filter: Astrodon 5nm H-alpha
Dates: May 7, 2017
Frames: Astrodon 5nm H-alpha : 30x1200" -20C bin 1x1
Integration: 10.0 hours
Avg. Moon age: 11.65 days
Avg. Moon phase: 89.44%
Astrometry.net job: 1575515
RA center: 304.053 degrees
DEC center: 43.666 degrees
Pixel scale: 3.167 arcsec/pixel
Orientation: 178.756 degrees
Field radius: 1.976 degrees
Locations: Little Piney Observatory, Hagarville, Arkansas, United States
DBW-111, aka Propeller Nebula and MRSL 497, is an emission nebula in the constellation Cygnus. The Propeller Nebula is part of a much larger nebular complex common in this area of the sky. Very little is known about this object. The Propeller Nebula is comprised mostly of Ha. There is some SII and very little OIII. Two years ago I did a narrower field of this object, using my 107mm triplet, in SHO tri-color. http://www.astrobin.com/206249/D/?image_list_page=3&nc=&nce=
I still dont have narrowband filters for the Moravian G2-4000. With the moon nearing full I decided to mount the Star71 and SBIG camera/SX filter wheel piggyback on the RC and shoot some Ha data.
Revision B is starless.
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