Hi all,
I’ve been finally able to get RGB data of the Rosette Nebula late February and add them to my previous set in H-alpha (
https://www.astrobin.com/391647/?nc=user). I guess the final result is not so bad but I could probably get more of this 3,6 hours of integration by preprocessing all my data under PixInsight, as some Astrobin’s friends invited me to do. I will give a try as soon I have more time ;-)
What to say about the Rosette, an iconic nebula lying in the constellation Monoceros, just 9° degrees apart from supergiant Betelgeuse? John Flamsteed first discovered in 1690 the inner open cluster (NGC2244) that lights up the nebulosity. Parts of the nebula have been discovered later by William Herschel's son, John. The nebula itself remains very faint and needs good sky transparency under dark location to be spotted on. These H II regions are about 5'200 l.y. away from Earth and span 130 l.y. across. (= 1°). Stellar winds from the cluster have swept out the hollow at the center of the Rosette, and compress the interstellar cloud leading to star formation. A very young star has been discovered in 2004, located in a Herbig-Haro object (HH 890 or Rosette HH 2).
Stacked in DSS, processed in PI and cosmetically cleaned in PS, as usual. I'm pretty happy to see how much improvement I was able to reach since my beginning in AP. For comparaison, I already took a picture of the Rosette last year (
https://www.astrobin.com/337275/?nc=user).
Thanks for looking at this new image and clear skies to all of you!
Christophe
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