Lagoon, Trifid and Chinese Dragon in HOO (Alfonso Caschili)

Celestial hemisphere: Southern · Constellation: Sagittarius (Sgr) · Contains: IC 1274 · IC 4684 · IC 4685 · Lagoon Nebula · M 20 · M 21 · M 8 · NGC 6514 · NGC 6523 · NGC 6526 · NGC 6530 · NGC 6531 · NGC 6544 · NGC 6546 · NGC 6559 · The star 7 Sgr · The star 9 Sgr · Trifid Nebula

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Lagoon, Trifid and Chinese Dragon in HOO

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Lagoon, Trifid and Chinese Dragon in HOO

For my first experiment with a remote observatory I went for a subject which usually is too low in the sky from my latitude.

Switched a bit the framing in the various days and tried to tame the dynamic range with different length exposures.

My current workflow for narrowband is:

Preprocessing with APP (PI is too slow on my M1max macbook pro for preprocessing but works fine for everything else).
Crop and DBE with 4 points.
Linear noise reduction with NoiseXterminator.
EZSoftstretch + some tweaks with GHS

Synthetic luminance combining Ha and Oiii with Pixelmath
Extract stars from L with StarXterminator in unblend mode
Some light LHT at medium/large scales
A bit more denoise with NoiseXterminator
MMT for a bit of sharpening

Combine starless Ha+Oiii in HOO with Pixelmath
A bit more denoise with NoiseXterminator

Apply processed L to RGB with LRGB tool
Saturation/Color tweaks with curves if needed

Export starless LRGB image and Stars to Photoshop for color/contrast adjustment

Resize if needed to fit size constraints

any advice is welcome!

Please note: The following tables are updated every 24 hours.

Distribution of astrophotographers

This table shows the number of distinct astrophotographers who have been assigned and IOTD/TP award compared to the total number of images awarded.
	Distinct awarded users	Total awarded images
Image of the day
Top picks
Top pick nominations

Distribution of subject types

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
Deep sky
Solar system
Extremely wide field
Star trails
Northern lights
Noctilucent clouds
Landscape

Distribution of data sources

This table shows the distribution of awards per data source, compared to the popularity of images acquired from that data source.
	Image of the day	Top pick	Top pick nominations	Total submitted
Backyard
Traveller
Own remote observatory
Amateur hosting facility
Public amaeteur data
Professional, scientific grade data
Mix of multiple sources
Other
Unknown

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Status	Basic success
Started	...
Astrometry.net job	6338648
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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Lagoon, Trifid and Chinese Dragon in HOO

Lagoon, Trifid and Chinese Dragon in HOO

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Lagoon, Trifid and Chinese Dragon in HOO

Lagoon, Trifid and Chinese Dragon in HOO

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