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Contains:  NGC 2024, NGC 2023, Horsehead nebula, IC 434, IC 432, NGC 1999, NGC 1990, M 43, NGC 1982, NGC 1977, NGC 1980, M 42, Great Nebula in Orion, NGC 1976, NGC 1975, NGC 1981, IC 423, The star Alnitak (ζOri), The star σOri, The star Alnilam (εOri), The star 45Ori, The star ιOri, The star θ2Ori, The star θ1Ori, The star 42Ori, The star 31Ori, Part of the constellation Orion (Ori)
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Widefield: From the flame nebula to Orion, 





    
        

            Gendra
Widefield: From the flame nebula to Orion

Widefield: From the flame nebula to Orion

Technical card

Resolution: 5953x3956

Dates:Dec. 25, 2018

Frames: 18x150" ISO400

Integration: 0.8 hours

Flats: ~24

Bias: ~26

Avg. Moon age: 17.89 days

Avg. Moon phase: 89.38%

Bortle Dark-Sky Scale: 7.00

Astrometry.net job: 2459971

RA center: 84.261 degrees

DEC center: -3.668 degrees

Pixel scale: 3.949 arcsec/pixel

Orientation: 273.420 degrees

Field radius: 3.920 degrees

Data source: Backyard

Description

A shot from M42 to the flame and horsehead nebula and my first guided expose.
Since the almost full moon was only 60° away in the sky the background-brightness was quite high. Moreover in a third of the shots I catched a nearby tree in the image (the "banding" in the upper left side is what’s left of the branches after sigma-clipping). Therefore the image was quite noisy from pushing the details and because I haven’t got a dark-frame library from the new camera, so I didn't use darks.
The guiding itself worked quite well even though I messed up the polar alignment and there was quite some dew on the guiding scope. But nevertheless the MGEN did a good job.

Comments

Author

Gendra
Gendra
License: None (All rights reserved)
1921
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Revisions

  • Widefield: From the flame nebula to Orion, 





    
        

            Gendra
    Original
  • Widefield: From the flame nebula to Orion, 





    
        

            Gendra
    B
  • Final
    Widefield: From the flame nebula to Orion, 





    
        

            Gendra
    D

B

Used new flatfield images to remove a huge "donut" on top of the flame nebula.

D

Reworked the curves and more sharpening.

Sky plot

Sky plot

Histogram

Widefield: From the flame nebula to Orion, 





    
        

            Gendra