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I agreeImaging telescope or lens:16" f3.75 Dream Astrograph
Imaging camera:Finger Lakes Instruments FLI ML16803
Mount:ASA - Astro Systeme Austria ASA DDM85
Software:PixInsight PixInsinght 1.8 RC7
Filter:Astrodon LRGB Gen II
Resolution: 2800x2800
Dates:Aug. 19, 2019
Frames: 55x300"
Integration: 4.6 hours
Avg. Moon age: 18.34 days
Avg. Moon phase: 86.25%
Astrometry.net job: 2871422
RA center: 20h 40' 45"
DEC center: +67° 41' 27"
Pixel scale: 1.765 arcsec/pixel
Orientation: 359.378 degrees
Field radius: 0.971
Data source: Own remote observatory
Remote source: Non-commercial independent facility
Rather happy with the SNR for this dim object, considering the limited integration time
One of the most interesting parts of the nebula is the bright part on the top left. This nebula is called Gyulbudaghian’s Nebula. This bipolar reflection nebula is generated by shock waves from a contracting protostar, PV Cephei. The nebula changes its shape and luminosity very fast, as illustrated below in the small animation. Thanks to Bernhard Zimmermann, Jerry Macon, Thomas V. Davis, Lloyd ‘Deep Sky West’ and Leo Shatz for providing me with their images for this animation.
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