Orion Nebula & Trapezium Cluster Close-up (chrislinyy)

Celestial hemisphere: Southern · Constellation: Orion (Ori) · Contains: Great Orion Nebula · M 42 · M 43 · Mairan's Nebula · NGC 1976 · NGC 1982 · Orion Nebula · The star θ1Ori · The star θ2Ori

Orion Nebula & Trapezium Cluster Close-up, chrislinyy

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Orion Nebula & Trapezium Cluster Close-up

Acquisition type: Electronically-Assisted Astronomy (EAA, e.g. based on a live video feed)

Powered byPixInsight

Orion Nebula & Trapezium Cluster Close-up

Acquisition type: Electronically-Assisted Astronomy (EAA, e.g. based on a live video feed)

Sub-exposures acquired by Telescope.live.

The RGB version consists of 3x180" and 3x20" for each of the RGB channels. The short exposures ensures the core (trapezium cluster) is not overexposed, and the longer exposures compensate for the nebulosity and noise in the darker parts. Two sets of RGB color images are created and the shorter exposure one is stretched such that the core is bright enough but the center 4 stars are distinguishable. Longer exposure is fully stretched to bring out the faint details. Then a luminance mask is made from RGB image and used to merge the long and short exposure in Photoshop, resulting in the final HDR blend.

The Hubble palette is composed of 5x180" of O3 and Ha, and 6x300" of S2. It is combined with Red = S2, Green = Ha, Blue = O3, and run through the AutoColor script in PixInsight to balanced the channels. SCNR is skipped since the green parts makes the rainbow color scheme more vivid. Then a luminance layer is extracted from the color image, and StarNet++ is used to remove all the stars from the color image. Finally the luminance is applied to the starless color image using the LRGB combination in PixInsight, so the stars in the narrowband image is white instead of glowing purple.

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Description: Hubble palette

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	Image of the day	Top pick	Top pick nominations	Total submitted
Backyard
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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 success
Started	...
Astrometry.net job	3966371
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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Orion Nebula & Trapezium Cluster Close-up

Orion Nebula & Trapezium Cluster Close-up

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Image Index:

Contribution Index (beta):

Orion Nebula & Trapezium Cluster Close-up

Orion Nebula & Trapezium Cluster Close-up

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Acquisition details

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B

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Sky plot

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