Cookie consent

AstroBin saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing AstroBin without changing the browser settings, you grant us permission to store that information on your device.

I agree
Contains:  IC 435, NGC 2024, NGC 2023, Horsehead nebula, IC 434, IC 432, IC 431, The star Alnitak (ζOri), The star σOri
Getting plate-solving status, please wait...
Horsehead and Flame in H-alpha, 


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

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 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


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!



License: None (All rights reserved)


  • Horsehead and Flame in H-alpha, 


  • Final
    Horsehead and Flame in H-alpha, 




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

Sky plot

Sky plot


Horsehead and Flame in H-alpha,