NGC 2237-9, the “Rosette” nebula: an image – 30 Dec. 2024.
We are pleased to share the first narrowband (Ha) image taken with our 10” astrograph, covering the famous “Rosette” nebula in Monoceros, the Unicorn constellation.
NGC 2237-9, the “Rosette” nebula.
The image above comes from the average of 30, 180-second unguided exposures, remotely taken with the ARTEC250+Paramount ME+C3Pro61000EC robotic unit available as part of the Virtual Telescope Project facility in Manciano, Italy. Each image was taken through a 6nm H-alpha filter, to capture the signature of the Hydrogen in such an emission nebula.
The “Rosette” Nebula is quite complex, using for this several NGC numbers: 2237, 2238, 2239 and 2246. Of course, it also has other IDs, like SH 2-275.The open cluster NGC 2244 is located close to the center of the emission nebula.
This amazing nebula was discovered by John Herschel, Albert Marth and Lewis Swift in the XIX Century: it is located at about 5000 light years from us and it is one of the largest ones in our sky. Its real diameter is estimated in about 130 light years.
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