M83 (Alberto Tomatis)

M83

M83 è una fra le galassie più luminose del cielo; la si può individuare circa 18° a sud della brillante stella Spica,

poco a nord delle stelle che rappresentano la testa del Centauro ed è visibile anche con un binocolo di potenza medio-bassa

sotto cieli discreti.

Un telescopio da 150mm di apertura lo mostra come una macchia nebulosa senza una forma ben definita,

in cui il nucleo occupa una posizione

di rilievo e domina con la sua luminosità l'alone; con strumenti più potenti,

come un 250mm,

quest'ultimo appare attraversato da una banda scura a sud.

Pierre Mechain scoprì questa galassia 1780,

M83

appare vista quasi perfettamente di fronte,

pertanto le strutture dei bracci sono ben conosciute; la sua distanza è stimata

sui

15 milioni di anni luce appena, diventando così una delle galassie più vicine a noi.

Il suo moto nello spazio tuttavia la fa allontanare

da noi alla velocità di 337 km/s. Gran parte delle stelle di M83 sono

giovani e sono disposte sulle spirali, rendendole così molto luminose

e dal caratteristico colore azzurro;

le stelle centrali sono invece più vecchie e appaiono di colore giallo o rossastro.

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 pending
Started	...
Astrometry.net job	6941947
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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M83

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Image Index:

Contribution Index (beta):

M83

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