Elephant's Trunk Nebula, IC1396, Mosaic in Ha (legova)

Elephant's Trunk Nebula, IC1396, Mosaic in Ha

Completed 6 panel mosaic. An average of 4 hours of subs per panel.

Version F - added extra subs to even out background noise, so up to 5 hrs per panel. TVGDenoise version, think it looks a little better stretched. Not sure if it's as good 1-to-1... denoise maybe affected the faint nebulosity too much.

Version D/E - Finished the Ha frames, mostly. I'll maybe collect a few more subs for a couple of the panels to better match the grain with the other panels. I plan to continue with SII and OIII when the moon isn't around.

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Captured 3 of 6 planned panels in Ha for of a mosaic of IC1396. Each panel contains 3 hours of data. Minimal processing applied - no flats or background extraction, just some stretching to normalize the panels, GradientMergeMosaic to combine the panels, a slight stretch and LocalHistogramEqualization to improve the contrast on the merged image, and a tiny bit of noise reduction with AtrousWaveletTransform.

This is going to take a while to complete.

Version B - Merged linear images, stretched afterward.

Version C - More progress. Partial data for lower left, needs more light. Will work on real NR when I finish the 5th and 6th panel. Very quick mix for this version, but I'm getting more comfortable with the mosaic process. Got the flats problem worked out, so I calibrated correctly this time.

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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.
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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	Basic failed
Started	...
Astrometry.net job	727717
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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