NGC 7822, the Cosmic Question Mark...? (Charles Pevsner)

Celestial hemisphere: Northern · Constellation: Cassiopeia (Cas) · Contains: 10 Cas · 13 Cas · HD1009 · HD14 · HD1426 · HD1456 · HD1559 · HD1624 · HD1658 · HD1695 · HD1769 · HD2110 · HD221437 · HD221512 · HD221862 · HD221946 · HD222217 · HD222471 · HD222552 · HD222568 · HD222629 · HD222670 · HD223128 · HD223274 · HD223358 · HD223670 · HD224826 · HD224918 · HD225009 · HD225010 · And 44 more.

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NGC 7822, the Cosmic Question Mark...?

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NGC 7822, the Cosmic Question Mark...?

A common story with emission nebulae: Ungrateful children. Radiation from the central cluster of newly formed stars is blasting away the molecular clouds that led to the star formation in the first place.

Although it’s not the brightest star in this image, BD+66 1673 (lying above the inverted horse’s head) is the one of the hottest stars within a kiloparsec of the sun, about 100,000 times brighter than the sun. Its powerful stellar winds are thought to be largely responsible for sculpting this rich and questionable nebular complex.

The dot that punctuates the question mark is the Little Rosette Nebula (LBN 577, Sh2-170), a diffuse H-II region ionized by a central star, LS I +64 11, part of Stock 18 (the 18th of 24 small open clusters cataloged by Jurgen Stock in the 1950’s).

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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	Advanced success
Started	...
Astrometry.net job	9404955
PixInsight job	XM4HU2ZF63K88M2DKE5F3GLONLLG1IIQ
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	00h00m53s.47
RA (top/left)	00h35m41s.87
RA (top/right)	23h25m07s.15
RA (bottom/right)	23h32m25s.60
RA (bottom/left)	00h30m36s.29

Dec (center)	+66°38′06″.7
Dec (top/left)	+68°56′26″.8
Dec (top/right)	+68°46′40″.5
Dec (bottom/right)	+63°55′41″.5
Dec (bottom/left)	+64°03′42″.7

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NGC 7822, the Cosmic Question Mark...?

NGC 7822, the Cosmic Question Mark...?

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NGC 7822, the Cosmic Question Mark...?

NGC 7822, the Cosmic Question Mark...?

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