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Here's a close-up of the chain of dark clouds of the Rosette Nebula using public domain data.
I've used IPHAS survey H-alpha as luminance with a colour layer derived from the Digitized Sky Survey red/blue channels (transformed to a SHO style turquoise/gold colour layer).
My own 8'' GSO RC version (last image below) was the inspiration (shown for low-res comparison).
Some people see "animals" formed from the dark clouds... I see a leaping jaguar top right (or spanner!) and an ostrich bottom left.
The tiny dark circles to the left of the jaguar's head are referred to as globulettes in Gahm et al (2007). The smaller circles are estimated to have masses of about 1-2 times that of Jupiter and a radius of about 2,000 AU and are speculated to result in the formation of free-floating interstellar planetary-mass objects.
-Photoshop (with Google Nik Collection for output sharpening and noise reduction)
-Defect cleaning from the IPHAS frames, stacking and mosaic re-mapping using my own software (which occasionally seems to work)
-Again, my own processing software to do the red/blue to SHO-style colour mapping and also to make a local contrast layer
-H-alpha survey from the 2.5m Isaac Newton Telescope (www.iphas.org/data.shtml), 120 second frames
-Red and blue from the ESO Digitized Sky Survey archive DSS2 (archive.eso.org/dss/dss)
-Star colours from GAIA DR2 Archive (gea.esac.esa.int/archive)
Unprocessed data here
The Rosette Nebula, with its inner star cluster NGC2244
A pseudo-HDR image because it's the combination of several developments from the same stacking result (could not bring out the colored nebula and master the stars in a single dev).
Gear: Olympus E-PL6 with Skywatcher 130PDS and CC on Omegon EQ-300 tracking RA
Capture: 10 × 60s × 3200iso, no darks/flats
Processing: Regim 3.4, Fotoxx 12.01+
Site: 50km from Paris, usually Bortle 4-5
This is the SHO result of my first imaging object with the cooled Canon 40D.
Through out the imaging, the camera failed a number of times due to condensation buildup inside and so this is a result of two different 40D bodies and sensors. I captured some HAlpha data with the originally cooled 40D before it failed and the second half of the HAlpha, OIII and SII are captured with the second modded and cooled 40D
Exposures: SII: 30x1200s HII: 30x600s OIII: 30x900s ISO1600
Telescope: BOSMA Beta RE
Focal length: 500mm