Widefield in Taurus : from Hyades to Pleiades (Thibault Sandre)

Celestial hemisphere: Northern · Constellation: Taurus (Tau) · Contains: Extremely wide field

Widefield in Taurus : from Hyades to Pleiades

Shot taken during my 4 days stay with my Airbus DS Club Astro mates, in the Southwestern France area sometimes called "Query's dark triangle". This region is one of the darker you can find over the French countryside. Indeed, the site was pretty dark : no lights on the horizon, a fair seeing despite a hight humidity level those nights. I was pretty much surprised to see the faint dust clouds revealing while processing the image, after only 1h00 total exposure on a cheap DSLR.

A special thanks to Marc R. for his mechanical tripod adapter for the Astrotrac mount. The polar alignment becomes very accurate, and the tracking over the 5min subs duration quasi perfect !

Btw, Canon EF 50mm 1.4 lens is working here at f/4.

** Processing details **

I applied here my basic Pixisight workflow for EOS DSLR images :

- preprocess simply using the BatchPrepocessing script

- BackgroundNeutralization

- DynamicCrop to remove undesired edges

- DynamicBackgroundExtraction (tolerance=2, samples radius=30, 10 samples per row + manual repositionning, substraction mode)

- ColorCalibration

- HistogramTransform (using auto stretch from ScreenTransferFunction)

- StarMask (should have been done at linear level, I had to adjust therefore the noise threshold to 0.3!)

- MorphologicalTransform for star size reduction (morpho selection, selection = 0.15, amount = 0.7)

- no nebula part so I skipped LHE and HDR wavelets

- ACDNR (no lum mask) + SCNR

- ColorSaturation (star mask active) + HistogramTransform to adjust image black point

- Final noise reduction with ATWavelets

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	Distinct awarded users	Total awarded images
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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
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	Image of the day	Top pick	Top pick nominations	Total submitted
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Other
Unknown

The “AstroBin Image of the Day and Top Picks”, or IOTD/TP, is a long-running system to promote beautiful, interesting, peculiar, or otherwise amazing astrophotographs, with a focus on technical excellence. Learn more.

Submitted The date and time when you submitted this image for IOTD/TP consideration.	...
Views by Submitters (available since September 19th, 2023) Every image is assigned to 50% of available Submitters. In the event that at least 80% of them don't view the image before its time in the IOTD/TP process expires, it's assigned to the other 50% of Submitters and the process begins anew.
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Promotions by Reviewers When 3 distinct Reviewers promote the image, it moves on to the next stage of the process: evaluation for IOTD status.
Early dismissal Staff members have a lot of images to inspect on a daily basis, and they can dismiss images if they believe they don't meet the requirements for IOTD/TP selection. If an image is dismissed 5 times, it's removed from the process. This streamlines the process and ensures that any bias present in promotions could be overruled by other staff members.

Status	Basic success
Started	...
Astrometry.net job	399116
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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Widefield in Taurus : from Hyades to Pleiades

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Widefield in Taurus : from Hyades to Pleiades

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