The Horsehead Nebula & IC 434 (Paul Lloyd)

Celestial hemisphere: Southern · Constellation: Orion (Ori) · Contains: B33 · Flame Nebula · HD37805 · Horsehead nebula · IC 434 · Orion B · Sh2-277

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The Horsehead Nebula & IC 434

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The Horsehead Nebula & IC 434

The famous Horsehead Nebula, catalogued as Barnard 33, is a cold and dense cloud of gas and dust that
arises out of the large cloud at the bottom of this image. We see it silhouetted against the bright emission
nebula, IC 434, behind it. This bright nebula is shot through with streaks believed to arise from magnetic
fields within IC 434. Both nebulae lie at the eastern end of Orion’s Belt of 3 bright stars, and is quite close
to the star, Alnitak (zeta-Orionis), from our perspective.

IC 434 lies about 1,500ly away, while B33 is about 1,375ly away. B33 was discovered on a photographic
plate by Williamina Fleming in 1888. It was examined by E.E. Barnard and entered into his catalogue of
dark nebulae as #33. IC 434 is part of the vast Orion molecular cloud, the closest star-forming region to us.

Telescope: William Optics FLT110 refractor + 2.0x Barlow, f=1540mm
Camera: ZWO ASI294MC Pro
Exposure: 47 x 300 sec, gain = 125, -10C, no filter
Bortle 3-4 sky, moonless
Field of View: approx. 0º 20’ x 0º 14’
Image processed and prepared in PixInsight and Photoshop Elements

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	Advanced success
Started	...
Astrometry.net job	8894442
PixInsight job	WJHM5GI4JH1EUPFY8UMS87ZQMZNFME27
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	05h41m01s.361
RA (top/left)	05h40m34s.485
RA (top/right)	05h40m33s.940
RA (bottom/right)	05h41m28s.234
RA (bottom/left)	05h41m29s.625

Dec (center)	-02°27′00″.62
Dec (top/left)	-02°17′07″.99
Dec (top/right)	-02°36′38″.90
Dec (bottom/right)	-02°36′52″.99
Dec (bottom/left)	-02°17′22″.79

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The Horsehead Nebula & IC 434

The Horsehead Nebula & IC 434

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The Horsehead Nebula & IC 434

The Horsehead Nebula & IC 434

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