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Contains:  NGC 2023, Horsehead nebula, IC 434, The star Alnitak (ζOri)
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Horsehead in Hydrogen-alpha, 


            Greg Schwimer
Horsehead in Hydrogen-alpha

Horsehead in Hydrogen-alpha

Technical card

Resolution: 4458x3551

Dates:Jan. 5, 2018

Frames: 13x3600"

Integration: 13.0 hours

Avg. Moon age: 18.63 days

Avg. Moon phase: 84.05% job: 1881347

RA center: 5h 41' 0"

DEC center: -2° 26' 38"

Pixel scale: 0.733 arcsec/pixel

Orientation: 133.167 degrees

Field radius: 0.580


Horsehead Nebula in Ha. This one gave me some trouble. The data was excellent, but Alnitak insisted on reflecting all over it. It took quite a bit of mask wizardry to clean it up.



Greg Schwimer
License: Attribution-ShareAlike Creative Commons

Sky plot

Sky plot


Horsehead in Hydrogen-alpha, 


            Greg Schwimer