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Contains:  NGC 6914, M 29, NGC 6913, NGC 6910, gamma Cyg nebula, IC 1318, IC 4996, Crescent nebula, NGC 6888, The star 40Cyg, The star Sadr (γCyg), The star 36Cyg, The star 34Cyg, The star 29Cyg
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Sadr Region Widefield - Butterfly and Crescent Nebulae, 





    
        

            Gabriel R. Santos...
Sadr Region Widefield - Butterfly and Crescent Nebulae

Sadr Region Widefield - Butterfly and Crescent Nebulae

Technical card

Resolution: 2400x1600

Dates:Sept. 16, 2017

Frames: 20x240" ISO800

Integration: 1.3 hours

Darks: ~10

Bias: ~30

Avg. Moon age: 25.62 days

Avg. Moon phase: 16.34%

Mean SQM: 21.30

Mean FWHM: 2.60

Temperature: 11.00

Astrometry.net job: 1913655

RA center: 304.840 degrees

DEC center: 39.696 degrees

Pixel scale: 9.734 arcsec/pixel

Orientation: 56.032 degrees

Field radius: 3.900 degrees

Locations: Sítio, Cristina, MG, Brazil

Description

An image of challenges: First of all, imaging a beautiful emission nebulous region as this one.... with an Ha blocking, unmodded DSLR. Second, the surrounding starfield is so dense, that bringing up the nebulosity is a really difficult task. Finally, the elevation of this object never rises above 30º from my location - I had to deal with some LP gradients during processing. Overall, though, I was somewhat surprised with this image- far from perfect, far from my best. But a nice capture of this beautiful region.

*Please check the full image 2400px - resized from original 6000px)*

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 ~21.3*calculated), from Cristina, MG, Brazil (22ºS latitude).

Date and Time: September 16, 2017
Camera: Canon EOS T5 (unmodded), at ISO 800
Lens: Tamron 70-200mm f/2.8, operated at 200mm f/3.5
Mount: Sky-Watcher HEQ5, tracking, guided
Guiding: Starguider 50mm Guidescope + ASI120mm + PHD2; ~1.7" RMS
Exposure Detail: 20x240s (total 80min)

Comments

Author

grsotnas
Gabriel R. Santos...
License: None (All rights reserved)
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Sadr Region Widefield - Butterfly and Crescent Nebulae, 





    
        

            Gabriel R. Santos...