Hemisphere:  Southern  ·  Contains:  Horsehead nebula  ·  IC 434  ·  NGC 2023  ·  The star σOri
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The Horsehead Nebula, B33, 


            Steven Bellavia
The Horsehead Nebula, B33
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The Horsehead Nebula, B33

Technical card

Imaging telescopes or lenses: Borg 90FL

Imaging cameras: ZWO ASI 183MM Pro

Mounts: Celestron AVX Mount

Guiding telescopes or lenses: Agena Astro 50mm f/3.9 Guidescope

Guiding cameras: ASI224MC

Focal reducers: Borg 0.72X Quadruplet Super Reducer, #7872

Software: IDEIKI AstroPhotography Tool (APT)  ·  Stark Labs Nebulosity 4.2  ·  Digital Photo Professional  ·  Annie's Astro Actions V7  ·  Noel Carboni's Astro Tools for PhotoShop Noel Carboni Actions  ·  SharpCap Pro 3.2

Filters: Astronomik 6nm OIII  ·  Optolong 7nm Ha 2"

Dates:Jan. 11, 2019Jan. 12, 2019

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

Basic astrometry details

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 degrees

Resolution: 2490x2950

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.



Steven Bellavia
License: None (All rights reserved)


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    The Horsehead Nebula, B33, 


            Steven Bellavia

Sky plot

Sky plot


The Horsehead Nebula, B33, 


            Steven Bellavia