Saturday, February 16, 2008

Rosette Nebula in Ha

NGC 2237 the Rosette Nebula is located in the constellation Monoceros. The distance to it is about 5200 light years. This complex has multiple NGC designations: NGC 2237 usually used for the whole nebula, 2238, 2239 and 2246 are parts of the nebulous regions and 2244 open cluster inside the nebula. Because of the bright moon, this image is taken with H-alpha filter. Exposure is 5h 30m and a bit more sill needed. Taken with Takahashi EM-200USD3 equatorial mount, SW80ED refractor, William Optics 0.8x flattener/reducer and QHY8 camera. Bigger image is here. This is the first image guided with my new Starlight Express Lodestar camera. The better signal to noise ratio (compared to my old Meade DSI) results more accurate guiding.


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