ngc 3631 (Alberto Tomatis)

Celestial hemisphere: Northern · Constellation: Ursa Major (UMa) · Contains: NGC 3631

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ngc 3631

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ngc 3631

La galassia a spirale NGC 3631.
Dati di osservazione
( Epoch J2000.0 )
Costellazione    Ursa Major
Ascensione retta (α)    11 ore 21 m 02.9 s
Declinazione (δ)    53 ° 10 ′ 10 ″
Magnitudine apparente (V)    10.4
11.0 nella banda B
Dimensioni apparenti (V)    5,0 ′ × 3,7 ′
Spostamento rosso    0,003856 ± 0,000003

Posizione nella costellazione: Orsa Maggiore
Astrometria: Velocità radiale    1.156 ± 1 km / s
Distanza:    16,1 ± 1,1 Mpc (∼52,5 milioni di al )
Caratteristiche fisiche
Tipo di oggetto:    Galassia a spirale
Tipo di galassia:   SA (s) c; Sc; SA (s) c
Dimensioni:   77.000 al

NGC 3631 è una galassia a spirale situata nella costellazione dell'Orsa Maggiore a circa 55 milioni di anni luce dalla Via Lattea .

NGC 3631 è una galassia a spirale. Ha due bracci principali che iniziano vicino al centro. I due bracci principali si ramificano in bracci secondari con una luminosità superficiale inferiore. La galassia mostra un tasso di formazione stellare da moderato ad alto e regioni luminose HII presenti in tutti i bracci. Il tasso di formazione stellare della galassia è stimato in 4,6 all'anno.

L'idrogeno neutro è stato rilevato principalmente nel disco della galassia, ma è anche presente in un raggio pari a 1,5 volte il raggio della galassia in luce visibile. Vicino ai bracci a spirale, l'idrogeno forma quattro cicloni con motivi a spirale.

L'idrogeno neutro è stato rilevato principalmente nel disco della galassia, ma è anche presente in un raggio pari a 1,5 volte il raggio della galassia in luce visibile. Vicino ai bracci a spirale, l'idrogeno forma quattro cicloni con motivi a spirale.

Il nucleo della galassia ospita un buco nero supermassiccio con una massa di 10 7,4 (25 milioni di masse solari).

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Distribution of astrophotographers

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	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	9424853
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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