Horse head nebula - Halpha (Thibault Sandre)

Celestial hemisphere: Southern · Constellation: Orion (Ori) · Contains: 48 Ori · 50 Ori) · Flame Nebula · IC 431 · IC 432 · IC 434 · IC 435 · NGC 2023 · NGC 2024 · Orion B · The star Alnitak (ζ Ori · The star σ Ori

Horse head nebula - Halpha, Thibault Sandre

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Horse head nebula - Halpha

Powered byPixInsight

Horse head nebula - Halpha

Acquisition details

I was aiming to make an HaRGB image. Guiding and dew issues did not left me enough time to get sufficient broadband data (only 4 subs of 5 min per channel). I will try anyway to add some color to the Ha image.

Processing details

Preprocessing used BatchPreprocessing under Pixinsight (bias, dark, flats, ligth all added using winsorized sigma clipping in auto mode ... will try again with manual parameters to achieve a better bad pixel rejection)

Processing under Pixinsight:

Crop, star mask bulding

Linear noise reduction with ATrousWavelets

HistogramTransformation + nebula mask building

High ligths recovery using HDRWavelets (6 layers, 1 iteration) -- nebula mask active

Accentuation of nebular structures using LocalHistoEqualization (radius 100, contrast 2, amount 85%) -- min(nebula mask, star mask) active

Mid Histogram correction only on nebula using HistogramTransform

Non linear noise reduction using ACDNR with lightness mask active

Final black point correction using HistogramTransform

Original
Final
B

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	Image of the day	Top pick	Top pick nominations	Total submitted
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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.

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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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Status	Basic success
Started	...
Astrometry.net job	6531125
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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Horse head nebula - Halpha

Horse head nebula - Halpha

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Image Index:

Contribution Index (beta):

Horse head nebula - Halpha

Horse head nebula - Halpha

Equipment

Acquisition details

Description

Comments

Revisions

Sky plot

Histogram

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