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Location / Date |
Zellerndorf, Aug - Sept 2016 |
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Telescope / Mount / Guiding |
ASA 10" Astrograph, ASA 3" Wynne-Corrector (focal length 910mm) |
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Camera / Exposure |
FLI ML8300 with Astrodon filters for Luminance, Halpha and OIII 4 x 4 panel mosaic: Luminance 228 x 3min Total exposure time: 70h |
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Processing |
PixInsight, Fitswork, Photoshop |
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Notes |
This 4 x 4 mosaic shows the central region in the constellation Swan around the star Sadr (Gamma Cygni), in diagonal the field of view spans over 6 degrees. In the annotation I have added the moon as a size comparison. The region is full of emission nebulosity (Gamma Cygni nebula, IC 1318, Sh2-208, IC 1318B, LBN 249, ...), faint reflection nebulae (vdB 130, GN 20.25.3, ...), dark nebulae (Barnard 343, ...), open clusters (M 29, NGC 6910, IC 1311, Roslund 6, ...) and some planetary nebulae (Abell 69, Pa 6, Ju 1, Sd 1, ...). The little crescent-shaped nebula at lower right is NGC 6888, the Crescent Nebula. It formed when a hot giant star blew off its outer layers. |