The spiral galaxy NGC891 (l'AstroVan)

Celestial hemisphere: Northern · Constellation: Andromeda (And) · Contains: NGC 891

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The spiral galaxy NGC891

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The spiral galaxy NGC891

La galaxie spirale NGC891 se situe dans la constellation d'Andromède à 15 millions d'année-lumière de la Terre selon la mesure redshift (Hubble). Elle a été découverte par William Herschel en 1784. Elle renferme des régions d'hydrogène ionisé. Elle est particulièrement active et présente des jets d'ondes radio.
NGC 891 est, de notre Terre, vue par la tranche et le plan médian est traversé par une épaisse bande de poussière qui fend la galaxie en deux parties presque symétriques. Malgré une magnitude de 10,1, la faible luminosité surfacique de cette galaxie, due au masquage du noyau galactique par la bande d'absorption, la rend difficile à observer. Elle se trouve à proximité immédiate de l'amas de galaxies Abell 347 sans en faire partie (effet de perspective), cet amas se situant à plus de 250 millions d'années-lumière de notre Galaxie la Voie Lactée
Bien qu'imagée au C11 avec une focale 2035mm (réducteur) j'ai choisi de "cropper" l'image pour faire ressortir la bande de poussière et ses détails. Tout comme la galaxie du Sombrero, j'aime beaucoup les galaxies vues par la tranche.

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	8782958
PixInsight job	51MZHD44T06IAJENG6E3KEQEO9Y3WROX
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	02h22m33s.405
RA (top/left)	02h22m53s.829
RA (top/right)	02h23m09s.739
RA (bottom/right)	02h22m12s.726
RA (bottom/left)	02h21m57s.820

Dec (center)	+42°20′43″.40
Dec (top/left)	+42°11′45″.27
Dec (top/right)	+42°27′46″.10
Dec (bottom/right)	+42°29′40″.70
Dec (bottom/left)	+42°13′39″.61

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Contribution Index (beta):

The spiral galaxy NGC891

The spiral galaxy NGC891

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Image Index:

Contribution Index (beta):

The spiral galaxy NGC891

The spiral galaxy NGC891

Equipment

Acquisition details

Description

Comments

Sky plot

Histogram

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