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Contains:  Horsehead nebula, IC 434, IC 435, NGC 2023, The star Alnitak (ζOri)
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Horsehead Nebula in Ha, 


            Joel Shepherd
Horsehead Nebula in Ha
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Horsehead Nebula in Ha

Technical card

Dates:Nov. 29, 2015

Frames: 7x300"

Integration: 0.6 hours

Avg. Moon age: 18.54 days

Avg. Moon phase: 84.73%

Basic astrometry details job: 874660

RA center: 5h 41' 7"

DEC center: -2° 24' 39"

Pixel scale: 2.078 arcsec/pixel

Orientation: 121.201 degrees

Field radius: 0.590 degrees

Resolution: 1600x1274

Locations: Home, Seattle, WA, United States


Taken in less than ideal circumstances: fog rolling in (hence the small number of lights), off-balance telescope and unhappy guiding software. Nonetheless, there it is. Looking forward to a clear, unhurried night to give this subject its proper due.



Joel Shepherd
License: Attribution Creative Commons

Sky plot

Sky plot


Horsehead Nebula in Ha, 


            Joel Shepherd