Abell 85 (Jan Veleba)

Celestial hemisphere: Northern · Constellation: Cassiopeia (Cas)

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Abell 85

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Abell 85

This nebula was the biggest pain to process. I knew that it's really faint and that the processing is going to be difficult but boy, it was even harder than I'd thought. This nebula is almost invisible in one single 10 minute exposure in Ha, completely invisible in O3. After nearly 30 hours and stacking you find out that it is absolutely sunken in the stars and you basically see just some shapeless blob in the background. To overcome this I had to come up with absolutely new approach on how I process and reduce stars. It's still not perfect but my regular workflow just didn't do the job I wanted it to do. It would also be helpful to finish shooting the oxygen channel but unfortunately I already spent so much time on this and weather doesn't look too good in the near future. Plus the necessity to shoot this object during new moon due to its brightness adds just too many variables and instead of waiting I've decided to finish it and move on to some other objects. I hope you like it anyway.

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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	5262545
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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Abell 85

Abell 85

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Image Index:

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Abell 85

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