SH2-201 (Alberto Tomatis)

Celestial hemisphere: Northern · Constellation: Cassiopeia (Cas)

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SH2-201

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SH2-201

Sh2-201 è una nebulosa a emissione visibile nella costellazione di Cassiopea.

Si individua nella parte orientale della costellazione, lungo il confine orientale della grande nebulosa IC 1848;
il periodo più indicato per la sua osservazione nel cielo serale ricade fra i mesi di settembre e febbraio ed è
notevolmente facilitata per osservatori posti nelle regioni dell'emisfero boreale terrestre.

Si tratta di una regione H II compatta e apparentemente di forma bipolare, situata alla distanza di circa
9980 anni luce,sul Braccio di Perseo nella medesima regione del complesso W3/W4/W5; la nebulosa appare
attraversata da una nube molecolare con emissioni CO indicata in più studi con la sigla IC 1848-I, ed è associata
alla sorgente di radiazione infrarossa IRAS 02593+6016, coincidente con un maser con emissioni H2O.
Osservazioni al vicino infrarosso hanno permesso di individuare cinque sorgenti, la più brillante delle quali, denominata IRS2,
probabilmente coincide con la stella responsabile della ionizzazione della nebulosa; in generale, si ritiene che
le cinque sorgenti coincidano con altrettanti oggetti stellari giovani profondamente immersi nei gas.
La forma bipolare di Sh2-201 non è comunque reale ed è dovuta alla presenza di polveri che la oscurano in alcune parti,
facendola apparire con questa forma.

Da Wikipedia

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	8763130
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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SH2-201

SH2-201

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Image Index:

Contribution Index (beta):

SH2-201

SH2-201

Equipment

Acquisition details

Description

Comments

Sky plot

Histogram

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