Abell 31 - planetary nebula - SH2-290 - PK 219+31.1 (Gérard Nonnez)

Celestial hemisphere: Northern · Constellation: Cancer (Cnc) · Contains: IC 523

Abell 31 - planetary nebula - SH2-290 - PK 219+31.1, Gérard Nonnez

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Abell 31 - planetary nebula - SH2-290 - PK 219+31.1

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Abell 31 - planetary nebula - SH2-290 - PK 219+31.1

SH2-290 ou Abell 31 (ou PK 219+31.1) est une nébuleuse planétaire.

Elle est située dans la constellation du Cancer et se trouve à environ 2000 Années-lumière de nous.

C’est une des plus grosses nébuleuses planétaires dans le ciel (similaire à Hélix) mais très peu brillante avec une luminosité surfacique typique des nébuleuses planétaires anciennes qui se diluent doucement dans l’espace.

Abell 31 est donc une très ancienne nébuleuse planétaire dont le gaz a commencé à se disperser il y a plusieurs milliards d’années.

sur l'image, au dessus, à gauche, on peut distinguer une petite trace, elle correspond à l'astéroïde 339 Dorothéa qui était visible

Dorotea (officiellement 339 Dorothea) est un astéroïde de la ceinture principale avec un diamètre moyen d'environ 38,25 km. Découvert en 1892,

Son nom est dédié à l'astronome Dorothea Klumpke Roberts, épouse de l'astronome Isaac Roberts, et qui fut la première femme diplômée en mathématiques à l'université de la Sorbonne

il a une période orbitale de 1909 jours

L'astéroïde (339) Dorothea a été découvert par Max Wolf le 25 septembre 1892. Il est nommé en l'honneur de l'astronome franco-américaine Dorothea Klumpke.

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	Distinct awarded users	Total awarded images
Image of the day
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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
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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
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Public amaeteur data
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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	3270974
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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Abell 31 - planetary nebula - SH2-290 - PK 219+31.1

Abell 31 - planetary nebula - SH2-290 - PK 219+31.1

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Abell 31 - planetary nebula - SH2-290 - PK 219+31.1

Abell 31 - planetary nebula - SH2-290 - PK 219+31.1

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