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Contains:  Great Nebula in Orion, Horsehead nebula, IC 434, M 42, M 43, NGC 1976, NGC 1977, NGC 1980, NGC 1981, NGC 1982, NGC 1990, NGC 1999, NGC 2024, Part of the constellation Orion (Ori), The star Alnilam (εOri), The star Alnitak (ζOri), The star Mintaka (δOri), The star ηOri, The star ιOri, The star ρOri, The star σOri, The star τOri, The star ψ2Ori
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Central Region of Orion, 



    
        

            JDJ
Central Region of Orion
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Central Region of Orion

Technical card

Imaging telescopes or lenses: Nikon 50 f/1.8G

Imaging cameras: Nikon D5300 Full Spectrum Modified

Mounts: Celestron AVX Mount

Guiding telescopes or lenses: Agena Astro Guidescope, 50mm f/3.8, 190 mm focal length

Guiding cameras: ZWO ASI120MC-S

Software: PixInsight 1.8

Filters: IDAS LPS D1 Clip Filter (Nikon D5300)


Dates:Dec. 21, 2019

Frames: 41x180"

Integration: 2.0 hours

Avg. Moon age: 24.60 days

Avg. Moon phase: 25.04%


Basic astrometry details

Astrometry.net job: 3153062

RA center: 5h 35' 37"

DEC center: -1° 24' 57"

Pixel scale: 15.618 arcsec/pixel

Orientation: 1.924 degrees

Field radius: 8.751 degrees


Resolution: 3106x2575

Locations: Home, Silver Spring, Maryland, United States

Data source: Backyard

Description

The sight of Orion in the southern sky around midnight signals the start of the winter astro-imaging season. I shot some widefield images of my old favorite the other night. The results reminded me both of how much I enjoy this region of the sky and how bad the light pollution is in my southern sky. The full image includes the entire Orion constellation, but I had to crop it down to the central region due to extreme LP near the horizon. I was happy to see a bit of Barnard's Loop visible along with the usual highlights including the Orion nebula, Flame nebula, and Horsehead nebula.

Imaged with 50mm Nikon at F/4, IDAS LPS D1 Clip Filter, and full spectrum modified Nikon D5300.

Pre-processed using PixInsight Batch Pre-Processing (BPP) script. Images calibrated using darks, bias, and flats. Stacked 41 subs (180 sec at ISO 200) for a total integration time of ~2 hours. Post-processed in Pixinsight: Cropped, gradient removal with ABE (multiple applications), MLT for noise reduction, Photometric Color Calibration, stretched using masked stretch, ACDNR for noise reduction, and Color Saturation boost.

Comments

Author

JDJ
JDJ
License: None (All rights reserved)
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Revisions

  • Central Region of Orion, 



    
        

            JDJ
    Original
  • Central Region of Orion, 



    
        

            JDJ
    B
  • Final
    Central Region of Orion, 



    
        

            JDJ
    C

B

Description: Updated version with fewer subs. Original included some subs with tree branches on the left side of the frame (I have a narrow window for capturing all of Orion).

C

Description: NBRGB version adding Ha data from https://astrob.in/v199lp/0/

Sky plot

Sky plot

Histogram

Central Region of Orion, 



    
        

            JDJ