Crescent Nebula (Maurizio Prezioso)

Celestial hemisphere: Northern · Constellation: Cygnus (Cyg) · Contains: Crescent Nebula · NGC 6888

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Crescent Nebula

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Crescent Nebula

Si tratta di una tipica bolla di vento stellare generata da una massiccia stella di Wolf-Rayet (la HD 192163), che si trova al suo interno; questa stella sarebbe anche la responsabile della nebulosa, che costituirebbe il materiale degli strati più esterni della stella espulsi. Questo vento è andato a collidere col materiale espulso dalla stella durante il raggiungimento dello stadio di gigante rossa, fra 250.000 e 400.000 anni fa, energizzandolo. Il risultato è un guscio gassoso e la presenza di due onde d'urto, che hanno poi interagito col denso mezzo interstellare circostante.
Dati tecnici:
Telescopio principale: Celestron C8 edge HD ridotto a 1500mm di focale
Montatura EQ8 R-pro
Camera principale: ASI 2600 monocromatica raffreddata a -10c
Camera guida: ASI 290MM su apocromatico 60/340
Filtri utilizzati : Antilia Ha da 3nm; Antilia OIII 3nm circa 8 ore per canale frame da 300s
per l'acquisizione delle stelle sono stati utilizzati filtri optolong R/G/B circa 30 min per canale frame da 60s
totale acquisizione: circa 17.5 ore
Cielo Bortle 7
elaborazione di immagine HOO con stelle RGB
L'elaborazione é stata fatta unicamente con Pixinsight.

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	8500839
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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Crescent Nebula

Crescent Nebula

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Image Index:

Contribution Index (beta):

Crescent Nebula

Crescent Nebula

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Acquisition details

Description

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