Orion & Running man with lucky imaging (Julien Dufour)

Celestial hemisphere: Southern · Constellation: Orion (Ori) · Contains: 41 Ori A) · 41 Ori C · 41 Ori D · 42 Ori) · 43 Ori) · Great Orion Nebula · M 42 · M 43 · Mairan's Nebula · NGC 1973 · NGC 1975 · NGC 1976 · NGC 1977 · NGC 1981 · NGC 1982 · Orion Nebula · The star 45 Ori · The star Mizan Batil I (c Ori · The star Mizan Batil II (θ2 Ori · The star Trapezium (θ1 Ori A · The star θ1 Ori C · The star θ1 Ori D · Upper Sword · the Running Man Nebula

Orion & Running man with lucky imaging, Julien Dufour

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Orion & Running man with lucky imaging

Acquisition type: Lucky imaging

Powered byPixInsight

Orion & Running man with lucky imaging

Acquisition type: Lucky imaging

Orion is an extremely bright target.
It is so bright that even 1'' exposures already capture a lot of signal (R layer below).
Orion est une cible extrêmement brillante.
Elle est tellement brillante que des poses de 1'' présentent déjà beaucoup de signal (couche R ci-dessous).

Given how well-suited this target is, we decided to image it using Lucky Imaging.
The final field is a crop compared to the full frame.
Cette cible s’y prêtant bien, nous avons souhaité l’imager en Lucky imaging.
Le champ qui nous intéresse est un crop par rapport au champ complet.

We also processed the image with 2x drizzle to extract more details.
We created a first version using 1'' and 10'' exposures.
However, during stacking, we encountered a banding artifact in the background, which was difficult to correct in post-processing.
Aussi nous avons traité avec un drizzle x2 pour aller chercher plus de détails.
Nous avons réalisé une première version avec des poses de 1'' et des poses de 10''.
Mais à l’empilement nous avions un effet de trame dans le fond de ciel difficile à régler en post-traitement.

So we decided to add 60'' exposures to resolve this issue
In the final HDR composition:

The 1'' and 10'' exposures were used for the stars and the core of the Orion Nebula
The 60'' exposures were used for the dimmer background sky

Nous avons donc décidé d’ajouter des poses de 60'' pour régler ce problème.
Au final, dans cette composition HRD :

les poses des 10’’ et 1’’ sont utilisées pour les étoiles et le coeur de la nébuleuse d’Orion
les poses de 60'' pour le fond de ciel moins lumineux

Here is an animation illustrating the HDR processing :
Voici une animation illustrant l'utilisation du HDR dans le traitement :

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Status	Advanced failed
Started	...
PixInsight job	8HNG05CLTX31C7PE72QT1DP7T3VCPGRR
PixInsight queue size	n/a
PixInsight stage	PLATE_SOLVING_IMAGE

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