Derby and District Astronomical Society
IC 434 and The Horsehead Nebula (Barnard 33)
Emission and Dark Nebulae in Orion RA 05h 41m 00s Dec -02d 24m 00s
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This image shows the Horsehead Nebula at upper right with the Flame Nebula (NGC 2024) at left. It was taken by Adrian Brown during January and February 2012 and he comments that it was supposed to be a colour image but at the time he only managed to collect the red filtered data. It is comprised of sixty exposures of 6 minutes each taken with his Skywatcher 80EDPro refractor, an ATIK ATK16HR camera and Astronomik red and CLS light pollution filters.
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This image of the Horsehead Nebula was imaged over a few nights in December 2006 and January 2007 by Adrian Brown.
It was created from seven 30 minute exposures through a 6nm Astronomik hydrogen-alpha filter. For imaging Adrian used an ATIK ATK16HR
camera through a Skywatcher 80ED Pro refractor at f7.5. This was guided using an ATIK ATK-2HS camera through a Skywatcher 80T refractor. The
set up was mounted on a Celestron CGE mount.
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Adrian Brown took the following image of the Horsehead Nebula (Barnard 33) which is silhouetted against the
emission nebula IC 434. The bright star to the left of the Horsehead is Alnitak (Zeta Orionis) - the leftmost star in Orion's Belt
as seen from the UK. The Flame Nebula (NGC 2024) lies below Alnitak and has a dark tree-like structure of dust lanes superimposed against it.
This earns NGC 2024 its other name of The Christmas Tree Nebula. The bright star in the upper left corner of the picture is Alnilam (Epsilon
Orionis), the middle star of Orion's belt. Hence north is to the left in this picture and we are actually seeing Orion on its side in this view.
Adrian took this picture during the early hours of Friday, 4th November 2005. It was created from 2 hours and 20 minutes of exposure
(14 x 10min) taken with an ATK-16HR CCD camera, an Astronomik 13nm Hydrogen-Alpha filter and Chris Newsome's Vivitar 75-205mm f/3.5 zoom lens
which was set to 135mm and f/5.6.
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