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Contains:  Extremely wide field
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Heart Nebula, Soul Nebula, and Double Cluster at 85mm, 



    
        

            JDJ
Heart Nebula, Soul Nebula, and Double Cluster at 85mm
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Heart Nebula, Soul Nebula, and Double Cluster at 85mm

Technical card


Dates:Dec. 25, 2019Jan. 1, 2020

Frames:IDAS LPS D1 Clip Filter (Nikon D5300): 131x120" ISO200

Integration: 4.4 hours

Darks: ~50

Flats: ~15

Bias: ~20

Avg. Moon age: 17.34 days

Avg. Moon phase: 17.44%


Basic astrometry details

Astrometry.net job: 3175221

RA center: 2h 35' 42"

DEC center: +60° 48' 18"

Pixel scale: 9.382 arcsec/pixel

Orientation: 269.541 degrees

Field radius: 6.652 degrees


Resolution: 3926x3264

Locations: Home, Silver Spring, Maryland, United States

Data source: Backyard

Description

This wide field view of the region around the Heart Nebula (IC1805) was captured using an 85 mm/F1.4 Rokinon camera lens. This is my first image using this lens and I'm pretty happy with it so far. I really like wide field views with multiple DSOs and this focal length combined with the APS-C sensor on my Nikon D5300 gives me an ~15x10 degree FOV (I can just fit the main 'body' of Orion on the sensor). The big trick for me remains the horrendous light pollution from my backyard and I had to crop the original image down significantly and still have issues bringing out the faint nebulousity in these targets.

Imaged with 85mm/F1.4 Rokinon at F/4, IDAS LPS D1 Clip Filter, and full spectrum modified Nikon D5300.

Original version:
Pre-processed using PixInsight Batch Pre-Processing (BPP) script. Images calibrated using darks, bias, and flats. Stacked 141 subs (120 sec at ISO 200) for a total integration time of ~4.5 hours. Post-processed in Pixinsight: Cropped, gradient removal with ABE (multiple applications), MLT for noise reduction, Photometric Color Calibration, stretched using masked stretch, further stretch using a mask generated using Starnet process and histogram transformation to try and bring out the nebulousity, ACDNR for noise reduction, Morphological Transformation to shrink stars, and Local histogram transform.

Updated version:
Pixinsight NBRGB script used to mix Ha data with R channel and OIII data with G&B channels. NB data taken from: https://astrob.in/c9f3qn/B/

Comments

Author

JDJ
JDJ
License: None (All rights reserved)
750
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Revisions

  • Heart Nebula, Soul Nebula, and Double Cluster at 85mm, 



    
        

            JDJ
    Original
  • Final
    Heart Nebula, Soul Nebula, and Double Cluster at 85mm, 



    
        

            JDJ
    B

B

Description: NBRGB version

Sky plot

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Histogram

Heart Nebula, Soul Nebula, and Double Cluster at 85mm, 



    
        

            JDJ