About this Image |
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Embedded in interstellar dust the bright Lagoon Nebula (M 8) lies 5,000 light-years from Earth in the direction of the constellation Sagittarius.
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Optics |
20 " Keller cassegrain in corrected secondary focus at f/9 |
Mount | Liebscher GEM |
Camera | SBIG STL-11000M at -20C, 8-pos STL filter wheel |
Filters | Baader RGB, H-alpha, (7 nm) |
Date | May 08, 2008. |
Location | IAS/Hakos Namibia |
Sky Conditions | dark skies, raw FWHM 1.5-1.8" temperature 10 C, |
Exposure |
R:G:B = 20:20:20 minutes (10-minute sub-exposures); synthetic luminance used;
Ha: 3 x 30 min subexposures; all 1x1. |
Programs used |
Maxim DL 4.5;
CCDStack Photoshop CS3 |