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ASTRO: NGC 3938
NGC 3938 is one of my favourite galaxies since I first imaged it in 2002 (at
that time with an 8" Meade LX200 and MX516 camera, 2x20m exposure, to be found at http://www.slilge.de/MX512_img/3938-40gut.jpg.html ). I imaged it in three nights in April, of which only the first had good conditions (but I started late that night), the second had bad transparency and the third had clouds which eventually made the autoguider lose the guidestar. After processing the new frames I had to find that my previous attempts from 2009 and 2007 were deeper, so I added them to the stack. That cost sharpness and stars are not perfectly round any more, but the result is much deeper. Taken from the middle of Berlin with a Meade 10" ACF/ C8 on a G11 mount, Atik 383 and SXV-H9 cameras, 27x10m and 65x5m for Lum, 12x10m for RGB each. http://ccd-astronomy.de/temp7/3938colourgut.jpg Stefan |
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