The Horsehead Nebula - widefield (Andreas Eleftheriou)

Celestial hemisphere: Southern · Constellation: Orion (Ori) · Contains: 34 del Ori · 42 c Ori · 45 Ori · 46 eps Ori · 48 sig Ori · 50 zet Ori · Alnilam · Alnitak · B33 · Flame Nebula · Horsehead nebula · IC 420 · IC 423 · IC 426 · IC 431 · IC 432 · IC 434 · IC 435 · LBN 913 · LBN 914 · LBN 918 · LBN 921 · LBN 924 · LBN 925 · LBN 927 · LBN 928 · LBN 935 · LBN 939 · LBN 940 · LBN 944 · And 42 more.

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The Horsehead Nebula - widefield

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The Horsehead Nebula - widefield

This is a slightly cropped version from the original widefield frame of the F/3.6 TAKAHASHI FSQ 106ED and the huge sensor of the FLI PL16083 of SPA-1 of Telescope Live. The signal of the Ha was very strong but the Sii was quite weak and the Oiii even weaker (I had to toss a number of unusable frames). Uning PixInsight, after experimenting with several RGB combinations of the Ha, Oii and Sii datasets, I decided to use the Sii data to enrich the very week Oiii data on the Green Channel, while using the Ha as Red and the Oiii for Blue. I find the colors of the end result visually pleasant, (even if not quite the same with the natural RGB colors), and I think that they provide good visual support of the structural details and nebulosity of the area.

Original Data from Telescope Live.

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	Distinct awarded users	Total awarded images
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	Image of the day	Top pick	Top pick nominations	Total submitted
Backyard
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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.
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Status	Advanced success
Started	...
Astrometry.net job	5700321
PixInsight job	Y2FZHW4VGLXGYR7UIEGGSGQRSFYCNSUM
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	05h39m25s.32
RA (top/left)	05h30m56s.46
RA (top/right)	05h30m26s.59
RA (bottom/right)	05h47m57s.27
RA (bottom/left)	05h48m23s.80

Dec (center)	-02°27′12″.8
Dec (top/left)	+00°15′50″.5
Dec (top/right)	-05°04′23″.7
Dec (bottom/right)	-05°10′37″.5
Dec (bottom/left)	+00°10′36″.9

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The Horsehead Nebula - widefield

The Horsehead Nebula - widefield

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The Horsehead Nebula - widefield

The Horsehead Nebula - widefield

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