NGC 2841 (Alberto Tomatis)

Celestial hemisphere: Northern · Constellation: Ursa Major (UMa) · Contains: NGC 2841

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NGC 2841

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NGC 2841

NGC 2841 è una galassia a spirale visibile nella costellazione dell'Orsa Maggiore.

Può essere intravista con un telescopio con apertura pari o superiore ai 150 mm.

Si riteneva che la galassia NGC 2841 si trovasse a circa 11,1 Mpc (36 milioni di anni luce). Uno studio effettuato nel 2001 dal

Telescopio spaziale Hubble sulle variabili Cefeidi della galassia ha permesso di ottenere una stima più accurata della distanza:

14,1 ± 1,5 Mpc (circa 46 milioni di anni luce). Una nuova stima della distanza, più precisa, è stata ottenuta nel 2013

utilizzando una supernova di tipo Ia esplosa nel 1999, portando il valore a 14,6 ± 0,07 Mpc. Data la dimensione angolare apparente,

la galassia ha un diametro di almeno 112.000 anni luce, leggermente superiore a quello della Via Lattea, ma le stime superiori

(ottenute con diametri angolari meno restrittivi) la pongono a circa 150.000 anni luce, quindi più simile alla Galassia di Andromeda.

La galassia NGC 2841 i suoi bracci a spirale sono brevi e frammentati;

in particolare quelli della galassia NGC 2841 ospitano molte stelle giovani e calde.

È una galassia di 10ª magnitudine classificata SA(r)b, ovvero una galassia spirale (SA) con un anello centrale (r) in cui il contributo del nucleo

e del disco si equivalgono. Inoltre NGC 2841 è classificata come galassia LINER, ovvero una galassia che presenta una bassa ionizzazione

rispetto alle galassie "normali" nella regione nucleare.

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	4226391
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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NGC 2841

NGC 2841

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Image Index:

Contribution Index (beta):

NGC 2841

NGC 2841

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