Nebulosa Cuore Ic1805 (Carlo Tuorto)

Nebulosa Cuore Ic1805

La Nebulosa Cuore

W4 (IC1805) è nota con il nome di Nebulosa Cuore a causa della sua forma. E’ la più grande fra le tre nebulose principali del complesso W3/W4/W5, regione di formazione stellare nella costellazione di Cassiopea, che comprende anche la Nebulosa Anima (IC1848 o W5).
Al suo centro si trova l’ammasso aperto IC1805 o Melotte 15, sigla con cui sovente si indica l’intera struttura.
Le stelle più brillanti dell’ammasso sono nane blu, 24 delle quali possiedono una massa superiore a 10 masse solari, con una età compresa tra 1 e 3 milioni di anni.
Fra queste stelle blu ve ne sono 9 di classe spettrale O, racchiuse entro un raggio di 10 parsec, mentre il raggio totale dell’ammasso aperto è di 18 parsec.
Nei pressi della nebulosa sono in atto episodi multipli di formazione stellare.
La nebulosa è composta essenzialmente di HII e OIII, gas ionizzati dai venti stellari delle stelle presenti al suo interno.

25 light da 600 secondi
31 dark da 600 secondi
100 flat
Gain 120 temperatura - 10
Evostar Ed72
EQ5 pro
Asi 294 mc pro
Tecnosky Sharp Guide 50 V2
Asi 120 MM-S
Asiair pro
EAF zwo asi
Filtro OPTOLONG L-eNhance
Elaborazione con DSS e pixinsight

Coordinates
40.98255, 14.94966
SQM 20.32 mag./arc sec2
Brightness 0.805 mcd/m2
Artif. bright. 634 μcd/m2
Ratio 3.71
Bortle class 5
Elevation 504 meters

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

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