M42 final and composite version... (Guy LE BRAS)

M42 final and composite version...

After a number of rather unsuccessful attempts, which had given me an Orion nebula (M42) with strange colors or a burnt core, despite unsuccessful HDR composition attempts, I got to thinking... I took advice from Jean-Baptiste Auroux, who pointed out that my raw HOO stack was not saturated and that HDR composition was useless. So I went back to the drawing board, convinced that the two Antlia HaOIII and SIIHb filters could give very interesting results when composited with an RGB image. Here's the result I obtained by not pushing the sliders too far, to keep the result natural if not completely sharp. The image I'm presenting is a composition comprising an RGB image (60x5s) for 50%, a HOO image (90x120s) for 25% and a SHOHb image (90x60s) for 25%. For the record, this shot was taken with an Askar FRA 500 refractor, an ASI 2600 MC Pro camera and two Antlia 3nm filters (HaOIII and SIIHb). I hope you like it, because M42 is an ultra-classic target, but far from easy...

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

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.
Promotions by Submitters When 3 distinct Submitters promote the image, it moves on to the next stage of the process: evaluation for Top Pick status. This requirement, in addition to anonymization of images and distribution to only a subset of them, prevents biases and ensures that the best images are selected.
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 failed
Started	...
Astrometry.net job	9084124
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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