NGC 6888 CRESCENT NEBULA (mirko tondinelli)

Celestial hemisphere: Northern · Constellation: Cygnus (Cyg) · Contains: Crescent Nebula · HD191257 · HD192003 · HD192020 · HD192041 · HD192078 · HD192102 · HD192123 · HD192163 · HD192182 · HD192303 · HD192361 · HD192422 · HD192443 · HD192444 · HD228413 · HD228543 · LBN 203 · LBN 206 · LBN 208 · NGC 6888 · Sh2-105

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NGC 6888 CRESCENT NEBULA

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NGC 6888 CRESCENT NEBULA

It is located 2.5 degrees southwest of the star γ Cygni, immediately west of a very rich star field, which includes objects such as M29 and IC 4996. The most intense part of the nebula is located to the west, and forms an arc extended more in declination than in right ascension; this feature has led to the nebula being called crescent, since it has a "hump" to the west, like the Moon in its crescent phase. To locate it, you need a telescope, even if it has a small aperture; with binoculars it is possible to barely glimpse it in clear sky conditions. It is a typical stellar wind bubble generated by a massive Wolf-Rayet star (HD 192163), which is located inside it; this star would also be responsible for the nebula, which would constitute the material of the outermost layers of the expelled star. This wind collided with the material ejected by the star as it reached the red giant stage, between 250,000 and 400,000 years ago, energizing it. The result is a gaseous shell and the presence of two shock waves, which then interacted with the surrounding dense interstellar medium. Tecnical data: TS 115/800Asi 2600MCFilter L-Ultimate22x600"Gain 100 T 0°

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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
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Star trails
Northern lights
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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
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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.
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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	8124294
PixInsight job	NKROQQQXUFSEJ9R7L57HLB3VHIOMQ595
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	20h12m15s.559
RA (top/left)	20h07m20s.670
RA (top/right)	20h13m00s.754
RA (bottom/right)	20h17m08s.980
RA (bottom/left)	20h11m29s.250

Dec (center)	+38°23′20″.33
Dec (top/left)	+38°37′56″.91
Dec (top/right)	+37°24′22″.90
Dec (bottom/right)	+38°07′59″.99
Dec (bottom/left)	+39°22′17″.76

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NGC 6888 CRESCENT NEBULA

NGC 6888 CRESCENT NEBULA

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NGC 6888 CRESCENT NEBULA

NGC 6888 CRESCENT NEBULA

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