SH2-105 The Crescent Nebula (David Whelan)

Celestial hemisphere: Northern · Constellation: Cygnus (Cyg) · Contains: Crescent Nebula · HD192003 · HD192020 · HD192102 · HD192123 · HD192163 · HD192182 · HD192303 · HD192361 · HD192444 · HD192537 · HD228066 · HD228067 · HD228077 · HD228139 · HD228152 · HD228153 · HD228185 · HD228186 · HD228205 · HD228243 · HD228261 · HD228262 · HD228289 · HD228290 · HD228304 · HD228311 · HD228324 · HD228376 · HD228409 · And 12 more.

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SH2-105 The Crescent Nebula

Acquisition type: Electronically-Assisted Astronomy (EAA, e.g. based on a live video feed)

Powered byPixInsight

SH2-105 The Crescent Nebula

Acquisition type: Electronically-Assisted Astronomy (EAA, e.g. based on a live video feed)

SH2-105 (also known as NGC 6888 or Crescent Nebula) is an emission nebula in constellation Cygnus which ionized by the Wolf-Rayet star WR 136 which lies in a distance of about 5600 ly from earth (according to GAIA DR3). That kind of stars are supernova progenitors. At least a part of the gas was ejected when the star became a red giant. The apparent diameter of this nebula is about 17' (arcminutes).

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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	8668355
PixInsight job	C866AE87A09RK2GUYS2XFW9XNEBKBP0S
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	20h12m11s.390
RA (top/left)	20h09m30s.885
RA (top/right)	20h14m12s.733
RA (bottom/right)	20h14m53s.365
RA (bottom/left)	20h10m08s.664

Dec (center)	+38°21′20″.53
Dec (top/left)	+38°05′18″.47
Dec (top/right)	+37°55′14″.87
Dec (bottom/right)	+38°37′10″.31
Dec (bottom/left)	+38°47′18″.50

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SH2-105 The Crescent Nebula

SH2-105 The Crescent Nebula

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SH2-105 The Crescent Nebula

SH2-105 The Crescent Nebula

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