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Hemisphere:  Northern  ·  Contains:  Crescent nebula, IC 1318, IC 5068, IC 5070, NGC 6888, NGC 6914, NGC 6997, NGC 7000, NGC 7039, North America nebula, Part of the constellation Cygnus (Cyg), Pelican nebula, The star 34Cyg, The star 55Cyg, The star 57Cyg, The star 59Cyg, The star Deneb (αCyg), The star Sadr (γCyg), The star λCyg, The star νCyg, The star ξCyg, The star ω1Cyg, gamma Cyg nebula
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North America and Butterfly Nebulae Widefield - From Deneb to Sadr, 



    
        

            Gabriel R. Santos...
North America and Butterfly Nebulae Widefield - From Deneb to Sadr
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North America and Butterfly Nebulae Widefield - From Deneb to Sadr

Technical card

Imaging telescopes or lenses: Nikon Nikkor 105mm f/2.5 AI

Imaging cameras: Canon EOS Rebel T5/1200D

Mounts: Sky-Watcher HEQ5 PRO

Software: DeepSkyStacker  ·  DeepSkyColors Hasta La Vista Green  ·  Fitswork4 Fitswork 4.4.7  ·  Photoshop CC  ·  BackyardEOS  ·  EQASCOM  ·  Adobe Lightroom CC 2015  ·  Nik Collection

Accessory: Manfrotto 496 RC2 Ball Head


Dates:July 31, 2016

Frames: 17x240" ISO800

Integration: 1.1 hours

Darks: ~10

Flats: ~21

Avg. Moon age: 27.05 days

Avg. Moon phase: 6.81%

Mean SQM: 21.40

Mean FWHM: 4.80

Temperature: 4.40


Basic astrometry details

Astrometry.net job: 1243777

RA center: 20h 39' 5"

DEC center: +42° 37' 1"

Pixel scale: 18.228 arcsec/pixel

Orientation: 111.154 degrees

Field radius: 7.301 degrees


Resolution: 2400x1600

Description

Beautiful Nebulosity surronds this area in Cygnus. Some of the most notable objects are NGC 7000 - the North America Nebula and Pelican Nebula, near the star Deneb; Butterfly and Cresent Nebula (barely in the frame), near Sadr.

This northern contellation never rises much above the horizon from here, so the low altitude (~25 º) is further challenging in this already challenging hobby: LP gradients (still visible despite my efforts, from top left to bottom right); and some clouds lowered contrast. Nevertheless, I was quite surprised with the amount of nebulosity that came through this unmodded camera with relatively short integration time. What do you think?

*Please check the full image 2400px - resized from original)*

Constructive criticism, comments and suggestions are more than welcome in the comments section. Thank's for taking your time to look at this image.

Taken from Rural Skies (Bortle 3-4; NELM ~6.2; SQM ~21.4*calculated), from Cristina, MG, Brazil (22ºS latitude).

Date and Time: July 31st, 2016, at 00h (UTC-3, start of capture)
Camera: Unmodded Canon T5/1200D, at ISO 1600
Lens: Nikon Nikkor 105mm f/2.8 AI Version, operated at f/4.0
Mount: Sky-Watcher HEQ5, tracking, controlled with EQASCOM, unguided
Exposure Detail: 17x240s (total 68min)

*Revision -B- is a more agressively stretched and star shrinked version. The image shows the nebulosity better, but is borderline overcooked to me. Original is still Final, but I also uploaded this other version. What do you think?*

Comments

Author

grsotnas
Gabriel R. Santos...
License: None (All rights reserved)
3330
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Revisions

  • Final
    North America and Butterfly Nebulae Widefield - From Deneb to Sadr, 



    
        

            Gabriel R. Santos...
    Original
  • North America and Butterfly Nebulae Widefield - From Deneb to Sadr, 



    
        

            Gabriel R. Santos...
    B

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North America and Butterfly Nebulae Widefield - From Deneb to Sadr, 



    
        

            Gabriel R. Santos...