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Contains:  Great Nebula in Orion, M 42, M 43, NGC 1973, NGC 1975, NGC 1976, NGC 1977, NGC 1980, NGC 1981, NGC 1982, The star 42Ori, The star 45Ori, The star θ1Ori, The star θ2Ori, The star ιOri
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            Russell Valentine
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Technical card

Dates:Jan. 24, 2018

Frames: 65x10" bin 0x0

Integration: 0.2 hours

Avg. Moon age: 6.96 days

Avg. Moon phase: 45.47%

Basic astrometry details job: 1927466

RA center: 5h 34' 57"

DEC center: -5° 28' 44"

Pixel scale: 3.711 arcsec/pixel

Orientation: 4.630 degrees

Field radius: 1.782 degrees

Resolution: 2480x2409

Locations: Lawrence, KS, Lawrence, Kansas, United States

Data source: Backyard



Taken Jan 24, 2018 in Lawrence, KS, USA probably Bortle 6 with a bright white LED streetlight right across the street.


Canon T3i unmodded using Ekos for camera control
StarSync Tracker with Latitude stand
Canon EF-S 55mm-250mm IS II Telephoto Lens set at f/5.6 250mm


Light 65x10", ISO1600
Darks 20x10" as the last exposures of the night
Flats 14x1/640" with a tshirt over the lens look at a light illuminated by the sun
Darks for Flats 22x1/640"

First Processed in Siril

Flats dark subtracted and stacked
Darks stacked
Lights dark subtracted and flats applied then registered and stacked

Processed in Darktable with modules:

White Balance
Base Curve
Contrast Brightness and Saturation

Processed in the Gimp with G'MIC plugin

G'MIC -> Details -> Dynamic range increase
Colors -> Brightness-Contrast
Croped and Scaled down

Not the best image but I was happy I can get some details with the light pollution and it being just a standard camera lens.

Most of the time was actually image transfer from Camera RAM through USB cable to computer, in the future I think I will leave the images on the sd card.



Russell Valentine
License: None (All rights reserved)

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            Russell Valentine