Caldwell 27 (NGC 6888, Crescent Nebula) (Susan)

Celestial hemisphere: Northern · Constellation: Cygnus (Cyg) · Contains: Crescent Nebula · HD192003 · HD192020 · HD192163 · HD192182 · HD192303 · HD192361 · HD192444 · HD192537 · HD228066 · HD228067 · HD228077 · HD228139 · HD228152 · HD228153 · HD228185 · HD228186 · HD228205 · HD228243 · HD228261 · HD228262 · HD228289 · HD228290 · HD228304 · HD228324 · HD228376 · HD228409 · HD228410 · HD228411 · HD228412 · And 10 more.

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Caldwell 27 (NGC 6888, Crescent Nebula)

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

Powered byPixInsight

Caldwell 27 (NGC 6888, Crescent Nebula)

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

This is a combination of a PixInsight WBPP stack of 1,061 Stellina fits lights for nebulosity and a WBPP stack of 285 Stellina fits lights for star shape, both stacked with 100 darks. I edited the nebulosity stack with PixInsight and Photoshop. Star stack was edited with PixInsight. I'll need many more Stellina fits to improve nebulosity and star shape. Best eccentricity in this group of subs is .4626; I want enough subs to use a cutoff of 0.42. I captured the subs used for the current image on 2023-08-15.

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	Distinct awarded users	Total awarded images
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Deep sky
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	Image of the day	Top pick	Top pick nominations	Total submitted
Backyard
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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	8377144
PixInsight job	ENSR828F4D9MSON77FMZA2ER22S9LPVH
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	20h12m10s.50
RA (top/left)	20h14m46s.23
RA (top/right)	20h09m29s.83
RA (bottom/right)	20h09m35s.35
RA (bottom/left)	20h14m48s.87

Dec (center)	+38°20′18″.0
Dec (top/left)	+38°41′14″.8
Dec (top/right)	+38°40′00″.8
Dec (bottom/right)	+37°59′08″.8
Dec (bottom/left)	+38°00′21″.4

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Caldwell 27 (NGC 6888, Crescent Nebula)

Caldwell 27 (NGC 6888, Crescent Nebula)

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Image Index:

Contribution Index (beta):

Caldwell 27 (NGC 6888, Crescent Nebula)

Caldwell 27 (NGC 6888, Crescent Nebula)

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