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Contains:  IC 435, NGC 2024, NGC 2023, Horsehead nebula, IC 434, IC 432, IC 431, The star Alnitak (ζOri), The star σOri
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Horsehead and Flame in H-alpha, 





    
        

            fewayne
Horsehead and Flame in H-alpha

Horsehead and Flame in H-alpha

Technical card

Resolution: 2048x1493

Dates:March 19, 2019March 21, 2019March 22, 2019March 25, 2019

Frames:
ZWO Hɑ 7nm 1.25": 16x300" (gain: 110.00) -20C
ZWO Hɑ 7nm 1.25": 6x600" (gain: 110.00) -20C

Integration: 2.3 hours

Darks: ~100

Avg. Moon age: 16.05 days

Avg. Moon phase: 92.30%

Bortle Dark-Sky Scale: 7.00

Temperature: 7.20

Astrometry.net job: 2606762

RA center: 85.240 degrees

DEC center: -2.370 degrees

Pixel scale: 3.580 arcsec/pixel

Orientation: 94.985 degrees

Field radius: 1.260 degrees

Locations: My back yard, Madison, Wisconsin, United States

Data source: Backyard

Description

Another go at the Horse, or rather a reprocess with some more data. I was a little pickier about which frames I selected for this one, but had another 2 hours of 10-minute exposures to choose from, for a total of 2:40 integration time, evenly split between 5- and 10-minute subs (16x300 + 8x600, despite the tech card).

Since I was combing through everything I've shot in March (4 nights with at least one usable sub), centering and rotation varied enough that I had to composite the uber-stack with older images that had less data, so if you peer closely at the margins a multitude of sins will no doubt become apparent.

This is it for B&W Horsing around for now, I'm going start collecting RGB data. Hope to get some good stuff before the Equine Season is over!

Comments

Author

fewayne
fewayne
License: None (All rights reserved)
1300
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Revisions

  • Horsehead and Flame in H-alpha, 





    
        

            fewayne
    Original
  • Final
    Horsehead and Flame in H-alpha, 





    
        

            fewayne
    B

B

More carefully edited to reduce composite artifacts, some new localized noise/detail tradeoffs.

Sky plot

Sky plot

Histogram

Horsehead and Flame in H-alpha, 





    
        

            fewayne