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About this Image |
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The fainter galaxy NGC2841 is one of the early recognized spiral galaxies, first discovered by William Herschel in 1788.
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| Optics |
16" cassegrain in secondary focus at f/10 |
| Mount | MK-100 GEM |
| Camera | SBIG STL-11000M at -30C, internal filter wheel, |
| Filters | Astronomik LRGB |
| Date | Feb 08-13, 2008. |
| Location | Wildon/Austria |
| Sky Conditions | mag 5.5 sky, FWHM 1.5-2.0" temperature 0 C |
| Exposure | L:R:G:B = 500:160:120:160 minutes (20-minute sub-exposures). |
| Processing |
Image aquisition in Maxim DL 4.56, Preprocessing and deconvolution in CCDStack; Fitsliberator; Wavelet filter; Curves, high pass filter, unsharp mask, color balance in Photoshop; |