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I agreeImaging telescope or lens:Borg 90FL
Imaging camera:ZWO ASI 183MM Pro
Mount:Celestron AVX Mount
Guiding telescope or lens:Agena Astro 50mm f/3.9 Guidescope
Guiding camera:ASI224MC
Focal reducer:Borg 0.72X Quadruplet Super Reducer, #7872
Software:Stark Labs Nebulosity 4.2, Annie's Astro Actions V7, Noel Carboni's Astro Tools for PhotoShop Noel Carboni Actions, Digital Photo Professional, IDEIKI AstroPhotography Tool (APT), SharpCap Pro 3.2
Filters:Optolong 7nm Ha 2", Astronomik 6nm OIII
Resolution: 2490x2950
Dates:Jan. 11, 2019, Jan. 12, 2019
Frames:
Astronomik 6nm OIII: 25x300" (gain: 100.00) -15C bin 1x1
Optolong 7nm Ha 2": 30x300" (gain: 100.00) -15C bin 1x1
Integration: 4.6 hours
Darks: ~24
Avg. Moon age: 5.30 days
Avg. Moon phase: 28.67%
Bortle Dark-Sky Scale: 4.00
Temperature: -3.50
Astrometry.net job: 2467978
RA center: 5h 40' 40"
DEC center: -2° 27' 25"
Pixel scale: 1.361 arcsec/pixel
Orientation: 88.585 degrees
Field radius: 0.730
Data source: Traveller
The Horsehead Nebula (Barnard 33) is a dark nebula in the constellation Orion. The nebula is located just to the south of Alnitak, the easternmost star of Orion's Belt, and is part of the much larger Orion Molecular Cloud Complex. The nebula was first recorded in 1888 by Scottish astronomer Williamina Fleming on a photographic plate taken at the Harvard College Observatory. The Horsehead Nebula is approximately 1500 light years from Earth and 3.5 light years across.
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