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Contains:  Pelican nebula, IC 5070, The star 57Cyg, The star 56Cyg
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IC-5067 (Pelican Nebula), 





    
        

            Joel Shepherd
IC-5067 (Pelican Nebula)

IC-5067 (Pelican Nebula)

Technical card

Resolution: 1920x1513

Dates:Aug. 27, 2018Aug. 28, 2018Sept. 2, 2018Sept. 3, 2018Sept. 4, 2018

Frames:
Astrodon 1.25" 3nm SII: 29x600" bin 1x1
Astrodon 3nm OIII 1.25: 35x600" bin 1x1
Astrodon 5nm H-alpha: 30x600" bin 1x1

Integration: 15.7 hours

Avg. Moon age: 20.00 days

Avg. Moon phase: 66.48%

Bortle Dark-Sky Scale: 6.00

Astrometry.net job: 2374185

RA center: 312.844 degrees

DEC center: 44.163 degrees

Pixel scale: 2.064 arcsec/pixel

Orientation: 323.206 degrees

Field radius: 0.701 degrees

Locations: Home, Seattle, WA, United States

Data source: Backyard

Description

This was an amazing target in terms of the immensely strong signal of blue-ish area: at times I felt like I was working with plaster or paint, and not whisps of emitted photons. It proved to be very challenging though too. At the time, I was wrestling with guiding challenges, which I finally tracked down to the guide camera wiggling ever so slightly, only after ruling out practically every other cause. Auto-focus was (and continues to be) an imperfect science. A few of my flats were dubious, and so on. In processing, I ended up making four major efforts on it before finally getting to colors and intensity that I felt good about ... and still haven't figured out how to satisfactorily integrate a couple hours of RGB star data.

My friend @BrianSweeney suggested the target, and we also have some O-iii data that he collected from Phoenix (not used in this version). It was our first attempt at collaboration and one lesson learned was ... camera rotation matters! :-) So we may be shopping for rotators.

tl;dr: Surprisingly challenging all along the way, but worth the effort in the end.

Comments

Author

JoelShepherd
Joel Shepherd
License: Attribution Creative Commons
1051
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IC-5067 (Pelican Nebula), 





    
        

            Joel Shepherd