Several years of imaging of one of my very favourite targets: the Rosetta nebula in Monoceros
Synthetic RGB rendering obtained from Ha and OIII narrow band images. Published on the January 2008 issue of Coelum.
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Narrowband Rosetta: HαHα image with the Megrez 80 and Tele Vue reducer (41x16'). The corner of Old History: see here for and old shot on the ancient 2415 20 MB jpg. Stack of two exposures obtained several months apart. The field is 2° 51' by 3° 11'. 45 mn exposure, 300 mm f4. Kodak 2415 plus deep red filter. |
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Narrowband Rosetta: OIIIImage collected thought a 13 nm bandwidth filter centred around the OIII doublet. The image is constructed by using the green and blue planes of the RGB data. Megrez 80 and Tele Vue reducer (41x16').
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NGC 2237 "Rosetta nebula" (Monoceros)Close up of the centre of the nebula. The open cluster NGC 2244 lies in the lower left of the frame with the brightest stars shining at mag 6. Canon 350D, C8 f6.3. 38x8' at iso 800. |
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NGC 2237 "Rosetta nebula" (Monoceros)A wide field RGB image of the Rosetta taken with the Megrez 80 without field flattener. |
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"Rosetta Nebula" in Hα OIII RGB (Monocerotis)A wide field image with the Megrez 80. Modified Canon 350D. The data sets are: 41x16' Hα, 30x16' OIII and 44x4' RGB to build the colours of the star field (RGB: 44x4' exposures). 22 hours of total exposure in 6 nights. |
Send anything that comes to mind to Gimmi Ratto gimmi@in.cnr.it
Copyright © 1997-2008 by Gimmi Ratto. (May 25, 2008)
