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Hi! Here is my latest SHO image, it was a pain to acquire the data because this target sets below treeline from my observatory very early but I managed to pull off ~two hours per night.
Its almost spring so imaging season is coming to an end soon. I hope I can finish other SHO projects too in the coming weeks before astronomical darkness ends here in Finland.
27x300s SII, 30x300s Ha, 29x300s OIII. 10x120s R/G/B, total exposure time is approx. 8 hours.
Larger version: https://www.evenfall.space/post/cosmic-bloom
By Geordie mc
Qsi660wsg-8, TSQ65 refractor, AZEQ6GT mount. Guiding Lodestar x2 PHD2. N.I.N.A. Capture software. Processed in Pixinsight. 34x300sec Ha, 33x300sec OIII and 32x300sec SII. 65 darks. No flats or bias yet. This was a quick process just to see what I’d got. Needs some work but pleased so far. Outlet 4, SW France. Any helpful processing tips much appreciated.
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 Trifid nebula, aka M20 or NGC 6514, a popular and bright nebula about 4300 light years away in the constellation Sagittarius.
This image was taken through my Celestron 8" SCT on the CGEM at f6.3 using a cooled and astro-modded DSLR.
RGB subs: 6x60s, 5x120s, 5x180s, 5x240s, 4x300s
HII subs: 10x600s
OIII subs: 9x600s
Total Time: 04hr 21min.
Most of this image is natural color because I only used 10% of the HII and OIII stack to emphesize the detail in the red and blue hues.
I managed to get some time to process another of my images exposed in January/February 2020.
This was the last image when my USB port on my Astro40D failed. This happened while imaging this scene but it happened toward the end of the imaging plan so I got almost the subs that I wanted. The total exposure time was 16 hours and 16 minutes in ISO1600 for all of the subs, RGB, (OSC through the UV/IR Cut filter), HAlpha and OIII.
Imaged through my 8" SCT at f6.3, 1280mm FL.