The Horsehead Nebula (Barnard 33) is a dark nebula located near the star Alnitak which is the easternmost star in the belt of Orion. The constellation Orion is very prominent in he winter evening sky.

The nebula lies at approximately 1.500 light years from Earth, and is approximately 3.5 light years wide. A lot of star formation is taking place in this region. The red glow comes from hydrogen gas mostly behind the nebula which is ionized by the bright star Sigma Orionis.

The darkness of the Horsehead is caused mostly by thick dust.
Bright spots in the Horsehead Nebula’s base are young stars which are in the process of forming.

Previous/older images:

Image data

Object info
Name B33 in IC434 – The Horsehead Nebula
Type Dark nebula/Emission nebula
Constellation Orion
Right ascension 05h 40m 59s
Declination -02° 27′ 30″
Distance 1.500 ly
Other designations Barnard 33, IC434, LDN1630
Image info
Image date Jan. 09, 2011
Light frames 28x 6 min. UHC-S unbinned
Total integration 2h 48m
Dark frames 10x
Flat frames 15x p. filter unbinned. Created with an A3 size Posterpoweruk flatfield panel
Bias frames 15x
Software used CCDOps, CCDSoft, ImagesPlus, PixInsight LE, Photoshop CS4
Processing CCDOPS was used for focussing. Image Acquisition was done using CCDSoft.
All separate frames were calibrated, aligned and stacked in ImagesPlus 2.8.
PixInsight LE was used for DBE, Photoshop CS4 was used for further processing – curves adjustment, levels adjustment, etc.
Noel Carboni’s toolset was used as well (Local Contrast Enhancement, Deep Space Noise Reduction)
(L)RGB combine was done in Photoshop.
Equipment info
Telescope Orion Optics SPX 10″ Newton
Corrector Televue 2″ Paracorr coma corrector (FL: 1.380mm f/5.43)
Mount Losmandy G-11
Camera SBIG ST-8300M
Guide camera Atik 1HS Mono
Guide scope Celestron 60/700 Achromat
Autoguide software Guidemaster
Filters Baader 2″ UHC-S
Location Landgraaf, The Netherlands
Image comments