Contains: NGC 6914
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DBW-111, Propeller Nebula

Technical card

Resolution: 3519x2791

Dates: May 7, 2017

Frames: Astrodon 5nm H-alpha : 30x1200" -20C bin 1x1

Integration: 10.0 hours

Darks: ~30

Flats: ~30

Bias: ~200

Avg. Moon age: 11.65 days

Avg. Moon phase: 89.44% 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.

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.




Sky plot

Sky plot


DBW-111, Propeller Nebula, rflinn68

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Mono Only