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IC 1396 in H-alpha |
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About This Photograph
IC 1396 is cataloged as a star cluster with associated nebulosity. In this image, a special filter was used to let through mainly just the light of excited hydrogen gas. This has the effect of emphasizing the structure of the nebula and de-emphasizing the light from the stars, although they are still quite visible.
From just below center to the bottom of the image is the intriguing Elephant's Trunk nebula. It is a dark globule of gas and dust being eroded by the radiation pressure from the bright stars above it. Numerous other such globules of varying size are scattered throughout the nebula.
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Technical Details |
Optics: | Takahashi FSQ-106N. | Camera: | STL-11000M. | Mount: | Astro-Physics AP1200GTO. | Filters: | Custom Scientific 5nm H-alpha. | Dates/Times: | 16 August 2004. | Location: | my backyard observatory in Austin, Texas. | Exposure Details: | Ha = 4.5 hours (15-minute individual exposures). | |
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