The Flame Nebula and Horsehead Nebula in Ha and OIII (Stuart Stakoff)

Celestial hemisphere: Southern · Constellation: Orion (Ori) · Contains: 50 zet Ori · Alnitak · B33 · Flame Nebula · Horsehead nebula · IC 434 · IC 435 · NGC 2023 · NGC 2024 · Orion B · Sh2-277 · The star Alnitak (ζOri)

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The Flame Nebula and Horsehead Nebula in Ha and OIII

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The Flame Nebula and Horsehead Nebula in Ha and OIII

The Flame Nebula (NGC-2024) is an emission nebula. The star Alnitak shines high energy ultraviolet light into hydrogen gas that makes up the flame. This energy ionizes the hydrogen, causing it to lose an electron. The glow you see here is the result of the electrons recombining with the ionized hydrogen. There is also a dark nebula region at the center of the flame (more on dark nebulae below).

The Horsehead Nebula (Barnard 33) is a dark nebula - a very dense cloud of dust and gas that obscures light coming from objects behind it.

Both of the nebulae are about 900 -1500 light years from earth. They can be found in the Orion Constellation, very near the star Alnitak. This star is the easternmost star in Orion's belt. The image is comprised of 50 light frames, each exposed for 3 minutes, 49 flats, 50 darks and a superbias. An STC Astro Duo-Narrowband filter was used to isolate the Hydrogen Alpha (Ha) and Oxygen III (OIII) wavelengths.

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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
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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	Advanced success
Started	...
Astrometry.net job	4129904
PixInsight job	FFYT0EKRFHL204Z9NFZI33M7ZPEPO4FD
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	05h41m48s.60
RA (top/left)	05h39m42s.96
RA (top/right)	05h40m13s.79
RA (bottom/right)	05h43m53s.60
RA (bottom/left)	05h43m22s.36

Dec (center)	-02°03′47″.0
Dec (top/left)	-01°36′14″.8
Dec (top/right)	-02°37′58″.9
Dec (bottom/right)	-02°31′14″.8
Dec (bottom/left)	-01°29′30″.4

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The Flame Nebula and Horsehead Nebula in Ha and OIII

The Flame Nebula and Horsehead Nebula in Ha and OIII

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Image Index:

Contribution Index (beta):

The Flame Nebula and Horsehead Nebula in Ha and OIII

The Flame Nebula and Horsehead Nebula in Ha and OIII

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