One of the most famous objects in the sky is the dark nebula Barnard 33, more commonly known as the Horsehead Nebula. This is a tough object for visual observers due to the faintness of IC 434, however there have been reports of it being visible in a 4" telescope! One of the biggest problems it the bright glare from the bright star zeta orionis. (Alnitak) This glare can be seen in the image below as internal reflections across the image.
Combination of 20, 3 minute images, using an H-alpha filter. SBIG ST-8XE CCD.
5" f/5 refractor at prime focus.
Combination of 20, 5 minute images using an H-alpha filter.
SBIG ST-8E CCD. 5" f/5 refractor at prime focus.
Combination of 8, 3 minute images using using red and green filters and 10, 3 minute images using a blue filter.
SBIG ST-9XE CCD. 5" f/5 refractor at prime focus.
Combination of 6, 3 minute images using an h-alpha filter.
SBIG ST-8XE CCD. 5" f/5 refractor at prime focus.
2 minutes exposure, SBIG ST-9E CCD.
8" f/6.3 schmidt-cassegrain at prime focus.
Combination of 10, 3 minute images using a clear filter,
and 10, 3 minute images using red, green and blue filters.
SBIG ST-9XE CCD. 10" f/6.3 schmidt-cassegrain at prime focus.
Combination of 10, 3 minute images using a clear filter,
and 10, 3 minute images using red, green and blue filters.
SBIG ST-9XE CCD. 10" f/6.3 schmidt-cassegrain at prime focus.
Combination of 4, 5 minute images, SBIG ST-9E CCD.
14" f/11 schmidt-cassegrain with f/6.3 focal reducer.
Combination of 10, 3 minute images using a clear filter,
5, 3 minute images using red and green filters and 7, 3 minute images using a blue filter.
16" f/10 schmidt-cassegrain with f/6.3 focal reducer.
Combination of 10, 3 minute images using red and green and blue filters.
16" f/10 schmidt-cassegrain at prime focus.
Just to the north-east (upper left) of B33 is the reflection nebula, NGC 2023. This is a fairly easy object for a 6" telescope.
Combination of 20, 3 minute images using a H-alpha filter.
SBIG STL-1001E CCD. 16" f/10 schmidt-cassegrain at prime focus
Combination of 10, 3 minute images using a H-alpha filter.
SBIG STL-1001E CCD. 20" f/6.8 Dall-Kirkham cassegrain telescope at prime focus.
Combination of 20, 3 minute images using a H-alpha filter.
SBIG STL-1001E CCD. 20" f/6.8 Dall-Kirkham cassegrain telescope at prime focus.
Combination of 12, 5 minute images using an H-alpha filter.
SBIG STL-1001E CCD. 5" f/5 refractor at prime focus.
Also visible in the above image are the NGC 2024 (the Flame Nebula, and just above the Flame Nebula, is the reflection nebula IC 432. Off to the right (west) is what looks like a shock front surrounding a star. Between the Horsehead and the Flame, is the reflection nebula, NGC 2023.
Combination of 15, 30 second images, each with red, green and blue filters.
SBIG STL-1001E CCD. 5" f/5 refractor at prime focus.
Combination of 5, 3 minute images, each with red, green and blue filters.
SBIG STL-1001E CCD. 20" f/6.8 Dall-Kirkham cassegrain telescope at prime focus.
Combination of the above image and 15, 1 minute images unfiltered.
SBIG STL-1001E CCD. 20" f/6.8 Dall-Kirkham cassegrain telescope at prime focus.
