Clavius Crater (Bruce Rohrlach)

Contains: Solar system body or event

Clavius Crater

Acquisition type: Lucky imaging

Clavius Crater

Acquisition type: Lucky imaging

Located deep in the southern lunar highlands, Clavius Crater is one of the largest and oldest lunar craters, and the site of a ficitonal lunar settlement in Arthur C. Clarks Space Odyssy series. Clavius Base was placed under a quarantine with the news of the outbreak of an epidemic of Tycho fever when the Tycho Magnetic Anomaly TMA-1 artefact was excavated (Wikipedia).

Numerous craters (and 'craterlets') pepper the floor of Clavius.

Blancanus (partly shadowed) and Scheiner (fully shadowed) lie in the background. In the foreground, the 51-km-wide Porter crater with its central peak is superimposed on the NE rim of Clavius whilst directly up the image Rutherford overlaps the SE rim of Clavius. North is down. I have always liked the radiating topographic irregularities on the north side of Rutherford that lead down to the largest of the 4 arcuate-arrayed crater floor impacts.

Stack of 1000 frames.

Processing: Autostakkert 3, Registrax 6, Lightroom, Topaz Denoise.

Some of the best, most stable atmospheric conditions I have had with the 8 inch Newtonian in the last 4 years.

Skywatcher 8 inch/f5, ASI224mc, Televue 5x Powermate.

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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
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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
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Star trails
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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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