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Contains:  IC 1275, NGC 6559, IC 1274, IC 4685, NGC 6544, NGC 6546, NGC 6530, M 21, NGC 6531, M 8, Lagoon nebula, Hourglass nebula, NGC 6523, NGC 6526, Trifid nebula, M 20, NGC 6514, The star 11Sgr, The star 9Sgr, The star 7Sgr, The star 4Sgr
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Lagoon and Trifid - M8-M20 Nebulae - Reprocessed, 





    
        

            Gabriel R. Santos...
Lagoon and Trifid - M8-M20 Nebulae - Reprocessed

Lagoon and Trifid - M8-M20 Nebulae - Reprocessed

Technical card

Resolution: 1800x1112

Dates:July 3, 2016

Frames: 16x120" ISO800

Integration: 0.5 hours

Darks: ~26

Bias: ~20

Avg. Moon age: 28.47 days

Avg. Moon phase: 1.26%

Mean SQM: 21.40

Mean FWHM: 4.40

Temperature: 6.30

Astrometry.net job: 1687431

RA center: 271.309 degrees

DEC center: -23.191 degrees

Pixel scale: 11.086 arcsec/pixel

Orientation: 85.794 degrees

Field radius: 3.258 degrees

Locations: Sítio, Cristina, MG, Brazil

Description

A hopefully improved version, originally captured in 2016, presented here as a ~70% crop from the 200mm widefield. The 1st processing is here: http://www.astrobin.com/261417/0/

I tried to improve a bit in sharpness and contrast, but I just liked the color of my 1st version so much, I reused most of its color data. What do you think, was it improved?

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 3rd, 2016, at 23h (11pm) (UTC-3)
Camera: Unmodded Canon T4i/650D, at ISO 800
Lens: Tamron 70-200mm f/2.8, at 200mm, operated at f/3.5
Exposure Detail: 16x120s, total 32min

Comments

Author

grsotnas
Gabriel R. Santos...
License: None (All rights reserved)
3952
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Revisions

  • Lagoon and Trifid - M8-M20 Nebulae - Reprocessed, 





    
        

            Gabriel R. Santos...
    Original
  • Final
    Lagoon and Trifid - M8-M20 Nebulae - Reprocessed, 





    
        

            Gabriel R. Santos...
    B

B

Corrected color calibration

Sky plot

Sky plot

Histogram

Lagoon and Trifid - M8-M20 Nebulae - Reprocessed, 





    
        

            Gabriel R. Santos...