IC 434 (Sepultura)

Celestial hemisphere: Southern · Constellation: Orion (Ori) · Contains: Horsehead nebula · IC 434 · IC 435 · NGC 2023 · NGC 2024 · The star Alnitak (ζOri)

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IC 434

La Nebulosa del Cap de Cavall és una nebulosa fosca de la constel·lació d'Orió. La nebulosa està situada just sota Alnitak, l'estrella més a l'esquerra del cinturó d'Orió, i forma part del gran complex d'Orió. Es troba aproximadament a 1.500 anys llum de la Terra. És una de les nebuloses més identificables degut a la forma que pren el núvol de pols fosca i gas, de cap de cavall i d'aquí el seu nom.

El vermell brillant s'origina predominantment pel gas d'hidrogen que hi ha darrere la nebulosa, ionitzat per l'estel proper i brillant Sigma Orionis. La part fosca del cap de cavall està formada principalment per pols espès, encara que la part més baixa del coll del cap de cavall projecta una ombra cap a l'esquerra. Corrents de gas sortint de la nebulosa es canalitzen per un fort camp magnètic. Els punts brillants a la base de la Nebulosa Cap de Cavall són estrelles joves en el procés de formació.

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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
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 success
Started	...
Astrometry.net job	405002
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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IC 434

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