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Horsehead Nebula (B33) The Horsehead Nebula is a dark nebula cloud obscuring the red emission nebula IC434 in the unmistakable shape of a horse's head (always reminds me more of a seahorse actually). Very difficult to observe visually and is about 800 light years distant just south of the left most star in Orion's belt (Alnitak). It was a real treat seeing this nebula visually for the first time through a hydrogen-beta filter on a 20-inch dobsonian! The bright bluish reflection nebula below the horsehead is NGC2023. The yellow bright maple-leaf shaped nebula to the left is NGC2024 - another striking emission nebula sometime referred to as the Flame Nebula. |
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| Optics | Camera | ISO | Exposure | Mount/Guiding | Processing | Location | Date |
| TEC 140 @ f5.2 | Canon Rebel XT (350D) modified; Type 1a filter | 800 | 12x10 min | G11 with ST4 on TV85 | Dark Subtract, Registration, Stacking in DeepSkyStacker; Levels/Curves in PS7 | Borrego Springs, CA | 10/21/06 |
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Comments: Average seeing. No wind. Very pleasant conditions with great company and lots of scopes to enjoy while imaging at Nightfall. |
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