M20 M8 Mosaic over Dallas (Ron Crouch)

Celestial hemisphere: Southern · Constellation: Sagittarius (Sgr) · Contains: Lagoon Nebula · M 20 · M 8 · NGC 6514 · NGC 6523 · NGC 6526 · NGC 6530 · NGC 6546 · The star 7 Sgr · The star 9 Sgr · Trifid Nebula

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M20 M8 Mosaic over Dallas

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M20 M8 Mosaic over Dallas

As always this summer fighting for clear skies. We had a few reasonable night and I asked the scheduler to get RGBHO subs on M20 and M8. Ended up with about 1 hour for each filter for both objects. The RGB was 60s unguided and the Ha&O3 was 300s guided. It appears I would have probably been better off with 180s Ha subs as the tiny hourglass is clipped. Applied the same DBE process to the filter channels - one DBE for M8 another for M20.. Made the two RGB images and blended the starless Ha&O3 into each with pixel math.

Did very mild BlurX on both panels and after that applied ABE with 2nd order correction to each. Then assembled the mosaic with Photomosaic script - big shout out to both the script author and Adan Block for helpful hints of how to best get setup. After panel combination did a Masked stretch and tweaked the stretch for brighter mid tones. Applied very mild NoiseX on the non linear image and a bit of HDMI to compress the bright stuff a bit.

I learned a lot on this one. I was surprised I could do a RGB Mosaic 40 miles north of a city of 2.5 million hot people. I was also quite surprised at the level of detail the ONTC 150mm can capture. As always thanks so much for looking and I'm always on the lookout for suggestions.

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	Distinct awarded users	Total awarded images
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This table shows the distribution of awards per subject type, compared to the popularity of images of that subject type.
	Image of the day	Top pick	Top pick nominations	Total submitted
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	Image of the day	Top pick	Top pick nominations	Total submitted
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Public amaeteur data
Professional, scientific grade data
Mix of multiple sources
Other
Unknown

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Status	Basic success
Started	...
Astrometry.net job	8085893
PixInsight job	n/a
PixInsight queue size	n/a
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M20 M8 Mosaic over Dallas

M20 M8 Mosaic over Dallas

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M20 M8 Mosaic over Dallas

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