NGC6888 HII + OIII (NeedMoreCoffee)

Celestial hemisphere: Northern · Constellation: Cygnus (Cyg) · Contains: Crescent nebula · NGC 6888 · The star 34Cyg

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NGC6888 HII + OIII

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NGC6888 HII + OIII

My second narrowband attempt.

I have not had much opportunity because of smoke from wildfires. For the first time in several days we had a relatively clear sky last night so I decided to give it a try despite the near full moon.

Three hours of hydrogen but only two of oxygen (would like to have got more but had to go to bed).

I am pleased at the detail that has been brought out in the nebula and surroundings. Channel blend was a simple HOO, but I increased the blue to bring out the sheath around the nebula (making things a bit too purple probably).

First time acquiring around a meridian flip – pleased that PI seemed to have no problem registering the flipped images.

Significant problems at the moment are mechanical. Bad aberration towards the edges of the field (even after cropping off the worst). Not sure the distance of the sensor to the field flattener is correct even though I thought I measured it carefully. And of course still no tracking.

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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	Basic success
Started	...
Astrometry.net job	2220706
PixInsight job	H94MLWOTQVO0Z9S17FV9HNSIU8K9YMMK
PixInsight queue size	n/a
PixInsight stage	n/a

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NGC6888 HII + OIII

NGC6888 HII + OIII

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NGC6888 HII + OIII

NGC6888 HII + OIII

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