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Tuesday, December 31, 2013

Rosette Nebula

I had 2 clear nights in a row so I decided to give the Rosette Nebula another try. These were the 1st clear nights since the beginning of November.
 A little background on the Nebula first:
The Rosette Nebula  (Caldwell 49 or NGC 2237) is a large, circular H II region located in the constellation Monoceros .  Open cluster's NGC 2244 (Caldwell 50) stars have been formed from the nebula's matter.
The Rosette Nebula consists of 5 parts NGC 2237,NGC 2238,NGC 2239,NGC 2244,NGC 2246. The cluster and nebula are about 5,000 light-years from Earth and measure roughly 130 light years in diameter.  The nebula is estimated to be around 10,000 solar masses
 My last attempts were back in November of 2011 when I just started Astrophotography. The 1st was with my 8" Meade LX-50 and the 2nd was with an Orion ST-80T refractor. Both images were captured with a Canon T3i


I knew I would only have 2 clear nights, so I decided to capture enough sub-exposures through all of my filters to do 2 different versions. I wish I could have spent more time, but clear skies have been rare.
Telescope-AstroTech AT65EDQ
Mount-Orion Sirius
Guiding-Starlight Express OAG,QHY5L-II & Phd
R- 7x10 minutes
G-5x10 minutes
B-6x10 minutes
Ha-3x20 minutes(as green)
OIII-3x20 minutes(as blue)
SII-3x20 minutes(as red)

 The 1st is a more "natural" look, using the Red,Green & Blue filters with a small amount of Ha & OIII filters. The images were combined and processed in Photoshop CS6

The only filter I did not use on this one was the SII.
 I added that for the next image done in HST(Hubble Space Telescope) Palette.

Thanks for stopping by & looking!

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