NGC281 Nebulosa Pacman (Astroneck)

Celestial hemisphere: Northern · Constellation: Cassiopeia (Cas) · Contains: IC 1590 · NGC 281

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NGC281 Nebulosa Pacman

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NGC281 Nebulosa Pacman

La nebulosa Pacman es una región H II situada en el cielo en la constelación de Casiopea, a unos 9500 años luz de distancia. Una región H II es una enorme nube de gas (prácticamente hidrógeno) y plasma (gas ionizado) en la que hay una intensa formación de estrellas. Estas estrellas, jóvenes, calientes y masivas son, en su mayoría, del tipo espectral O y emiten una enorme radiación ultravioleta, la cual ioniza el hidrógeno de la nebulosa (le hace perder el electrón, por lo que el hidrógeno deja de ser neutro a ser catión, ion con carga positiva), haciendo que emita esa luz rojiza característica de las nebulosas de emisión.

En NGC 281 hay unos cuantos glóbulos de Bok, que son pequeñas nebulosidades oscuras de gas y polvo más densas que el resto de la nebulosa y en las cuales es donde se da la formación de estrellas. Los glóbulos de Bok son comunes en las regiones H II.

También es interesante esa especie de “carril” oscuro situado, en la imagen, en la parte superior.

IC 1590 es un cúmulo abierto asociado a la nebulosa y situado en su centro. Está formado por estrellas muy jóvenes y calientes de tipo espectral O y B. Destaca en este cúmulo la estrella HD 5005 (la más brillante del cúmulo), una gigante de tipo O y magnitud aparente 8. Las estrellas de IC 1590, especialmente HD 5005, son las que ionizan el hidrógeno de IC 281.

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	Basic success
Started	...
Astrometry.net job	4075163
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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NGC281 Nebulosa Pacman

NGC281 Nebulosa Pacman

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NGC281 Nebulosa Pacman

NGC281 Nebulosa Pacman

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