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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 Nebula - Widefield Ha, 


            Steve Milne
Horsehead Nebula - Widefield Ha

Horsehead Nebula - Widefield Ha

Technical card

Resolution: 1800x1482

Dates:Jan. 15, 2017

Frames:Chroma Ha 3nm: 23x1200" bin 1x1

Integration: 7.7 hours

Avg. Moon age: 17.96 days

Avg. Moon phase: 88.87% job: 2013387

RA center: 85.236 degrees

DEC center: -2.420 degrees

Pixel scale: 4.958 arcsec/pixel

Orientation: 90.382 degrees

Field radius: 1.606 degrees

Locations: Home Observatory, Doncaster, Nottinghamshire, United Kingdom


This is some Ha that I shot back in January 2017. I always hoped I would get the LRGB to go with this, but I have not yet got round to it. I thought I'd process the mono image and post it up for now, so that I don't forget about it.

This is from my home observatory in the UK, using a Williams Optics Star 71 and a Moravian G2-8300 CCD with Chroma 3nm filters.

Ha: 23 x 1200s



Steve Milne
License: None (All rights reserved)

Sky plot

Sky plot


Horsehead Nebula - Widefield Ha, 


            Steve Milne

In these public groups

UK Astro-Imaging
The refractors!