 M11, "the Wild Ducks" (open cluster in Scutum), full-color (L 11 x 20s, R 5 x 20s, G 5 x 20s, B 9 x 20s, all through a Hutech IDAS light-pollution filter) ST-9XE image at f/6.3 by Ben Zastnovik. |
 M16, the Eagle Nebula in Serpens, full-color (L 30 x 20s, R 30 x 20s, G 30 x 20s, B 45 x 20s, all through a Hutech IDAS light-pollution filter) ST-9E image at f/6.3 by F. Ringwald, processed by Steve Rodriguez. |
 M29, "the Cooling Tower", open cluster in Cygus the Swan, full-color (L 10 x 60s, R 5 x 60s, G 5 x 60s, B 9 x 60s) ST-9XE image through the 70-mm guidescope at f/5.7 by Michael Ragsdale. |
 M34, open cluster in Perseus, full-color (L 10 x 60s, R 5 x 60s, G 5 x 60s, B 9 x 60s) ST-9XE image through the 70-mm guidescope at f/5.7 by F. Ringwald, processed by Steve Rodriguez. |
 M35, "Lassell's Delight", open cluster in Gemini, full-color (L 15 x 120s, R 5 x 120s, G 5 x 120s, B 9 x 120s) ST-9XE image through the 70-mm guidescope at f/5.7 by F. Ringwald, processed by Nathan Siemens. |
 M41, open cluster in Canis Major, the Big Dog, full-color (L 10 x 60s, R 5 x 60s, G 5 x 60s, B 9 x 60s) ST-9XE image through the 70-mm guidescope at f/5.7 by Kenia Velasco. |
 M44, Praesepe, the Beehive, open cluster in Cancer, full-color (L 10 x 60s, R 5 x 60s, G 5 x 60s, B 9 x 60s) ST-9XE image through the 70-mm guidescope at f/5.7 by F. Ringwald. |
 M45, the Pleiades, open cluster in Taurus, full-color (L 79 x 180s, R 15 x 180s, G 15 x 180s, B 15 x 300s, all through a Hutech IDAS light-pollution filter) ST-9XE image through the 70-mm guidescope at f/5.7 by F. Ringwald. |
 Wide-field image of the Moon, median of 25 x 0.1-second ST-9XE exposures through the 70-mm guidescope at f/5.7 through a 9.0-nm Schuler H alpha filter and unsharp-masked by F. Ringwald. |
 M52 (at top left) and NGC 7635, the Bubble Nebula, open cluster and nebulosity in Cassioepeia, full-color (L 79 x 180s, R 15 x 180s, G 15 x 180s, B 15 x 300s, all through a Hutech IDAS light-pollution filter) ST-9XE image through the 70-mm guidescope at f/5.7 by F. Ringwald, processed by David Baer. |
 M52, open cluster in Cassieopeia, full-color (L 79 x 180s, R 15 x 180s, G 15 x 180s, B 15 x 300s, all through a Hutech IDAS light-pollution filter) ST-9XE image through the 70-mm guidescope at f/5.7 by F. Ringwald, processed by Shawn Walters. |
 M103, open cluster in Cassiopeia, full-color (L 10 x 60s, R 5 x 60s, G 5 x 60s, B 9 x 60s) ST-9XE image through the 70-mm guidescope at f/5.7 by David Baer. |
 NGC 861 and 869, the double cluster in Perseus, full-color (L 10 x 60s, R 5 x 60s, G 5 x 60s, B 9 x 60s) ST-9XE image through the 70-mm guidescope at f/5.7 by F. Ringwald, processed by Michael Ragsdale. |
 NGC 2254, the Christmas Tree cluster (upside-down), open cluster and nebulosity in Monoceros the Unicorn, full-color (L 79 x 180s, R 15 x 180s, G 15 x 180s, B 15 x 300s, all through a Hutech IDAS light-pollution filter) ST-9XE image through the 70-mm guidescope at f/5.7 by Ben Zastnovik. |
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Last updated 2018 April 17. Web page by Dr. Ringwald (ringwald[at]csufresno.edu and replace [at] with @)
Department of Physics, California State University, Fresno. Please read this disclaimer.