Sagittarius to Scutum (Doug Gray)

Celestial hemisphere: Southern · Constellation: Sagittarius (Sgr) · Contains: Eagle Nebula · IC 4701 · IC 4715 · Lagoon Nebula · M 16 · M 20 · M 24 · M 7 · M 8 · NGC 6475 · NGC 6514 · NGC 6523 · NGC 6526 · NGC 6611 · Part of the constellation Sagittarius (Sgr) · Part of the constellation Scutum (Sct) · Ptolemy's Cluster · Small Sgr Star Cloud · The star Alnasl (γ2Sgr) · The star Kaus Australis (εSgr) · The star Kaus Borealis (λSgr) · The star Media (δSgr) · The star Nunki (σSgr) · The star αSct · The star μSgr · The star νOph · The star οSer · The star φSgr · Trifid Nebula

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Sagittarius to Scutum

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Sagittarius to Scutum

So many stars in this part of the sky. Most of the post-processing techniques I've been practicing don't seem to work with this image as a result. This shot contains the core of the milky way and a bunch of narrowband targets I have on my list. I like doing these ultra wide-field shots to put the closeup shots in perspective.

Stacking, gradient removal, and compositing in Siril. Camera raw filter in Photoshop. I think my flats need to be reshot, as these were from over 6 months ago and the aperture on this lens is held open with a piece of plastic which is probably in a slightly different position now. I had to try to remove a radial gradient manually in photoshop as a result, with mixed success. May come back and fix it later. Skies have been smokey recently, which is actually worse than clouds.

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Description: Reshot flats twice, but still had issues in the Blue & OIII channels. I reprocessed from scratch anyways and just spent more time cleaning things before compositing the channels back together. I also used StarNet++ on the Ha/OIII channels this time and scaled those layers more, which is why the emission nebula are much more apparent in this one. Still uncertain about the color balance as I'm red-green color blind and this one deviated from the photometric calibration quite a bit.

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Status	Advanced failed
Started	...
Astrometry.net job	5497579
PixInsight job	64VCH6NT8FJ5OVVTKQ4AH2YBY9LTX214
PixInsight queue size	n/a
PixInsight stage	PLATE_SOLVING_IMAGE

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Sagittarius to Scutum

Sagittarius to Scutum

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