IC1396 Mosaic (dheilman)

Celestial hemisphere: Northern · Constellation: Cepheus (Cep) · Contains: IC 1396

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IC1396 Mosaic

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IC1396 Mosaic

This target revisited represents a first for me - a first stab at a mosaic. This is a simple (as if) two panel mosaic of IC1396. Preprocessing was done in PI as well as stitching the panels together - a combination of StarAlignment and GradientMergeMosaic tools. Luckily, I didn't have much in the form of gradients to trouble with (unlike the one I'm working on now - ugh) and I was pleased with how well this went together. After processing the mosaic for each channel (Ha, SII, OIII) I processed starless images of each using StarNet++ and used tonemapping to process from there using PS. Stars were added back and Ha channel was used for luminance.

This expansive nebula, approximately 2400 light years from Earth in the constellation Cepheus, contains gasses and dust irradiated and compressed from a nearby massive star. This has given rise to stellar nurseries throughout the molecular cloud which have blown away surrounding gas and dust into distinct shapes. One such nursery exists in the large globule at the end of the gas plume in this image. Two young stars have expelled gasses around them to form the hole that makes the eye of the Elephant.

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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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Noctilucent clouds
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Artificial satellite

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
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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.
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.

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