NGC 281 (SH2-184) (Alberto Tomatis)

Celestial hemisphere: Northern · Constellation: Cassiopeia (Cas) · Contains: IC 1590 · NGC 281

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NGC 281 (SH2-184)

Link: https://alto-observatory.smugmug.com/

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NGC 281 (SH2-184)

Link: https://alto-observatory.smugmug.com/

NGC 281 è una nebulosa a emissione visibile nella costellazione di Cassiopea; circonda l'ammasso aperto IC 1590. Chiamata Nebulosa Pacman.

Si individua 1,5 gradi ad est della stella α Cassiopeiae; occorrono strumenti potenti per poter individuare la nebulosa, che sicuramente è l'oggetto più importante, dato che l'ammasso ad essa associato è formato da pochi astri e dominato da una stella doppia di ottava magnitudine. La nebulosa appare solcata in modo evidente da una vena scura, che la attraversa in senso est-ovest; perpendicolare a questa se ne individua un'altra, rivolta verso sud: viene così a formarsi una "T" che segna profondamente tutto l'oggetto.

RC 16'' f/8
GTO 1600 Astrophisycs
QHY268M
20 pose in Ha da 120'' non giudate bin 3x3
12 pose Red da 60'' non guidate bin 3x3
8 pose Green da 60'' non guidate bin 3x3
18 pose Blue da 60'' non giudate bin 3x3

In remota da Alto-Observatory
Canino (VT)

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	8564339
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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NGC 281 (SH2-184)

NGC 281 (SH2-184)

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NGC 281 (SH2-184)

NGC 281 (SH2-184)

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