Clavius (Bruce Rohrlach)

Contains: Solar system body or event

Clavius

Mighty Clavius crater (225 km across and about 4 billion years old) with Porter (in the foreground) on the rim of Clavius. Rutherfurd (2) lies further back on the left rim of Clavius and is the first of 6 craters in descending size that form a fortuitous semi-circular arc across the floor of Clavius. Behind Clavius lies Blancanus (with nice detail illuminated on the back wall) and Scheiner further up and right with the smaller crater in its centre. Klaproth is the illuminated smooth-floored crater at top left.

Nasa’s SOFIA (Stratospheric Observatory for Infrared Astronomy) has detected water molecules (H2O) in Clavius Crater, one of the largest craters visible from Earth, located in the Moon’s southern hemisphere. Previous observations of the Moon’s surface detected some form of hydrogen, but were unable to distinguish between water and its close chemical relative, hydroxyl (OH). Data from this location reveal water in concentrations of 100 to 412 parts per million within the lunar soil in Clavius crater (about 1/100th the concentration seen in the Saharan regolith). Thus not all lunar water is locked in dark unlit cold-traps.

SW 8 inch f/5 Newtonian, Televue Power mate 5x (imaging focal length ~7000mm).
ASI1600mm Pro.

Stack of 500 (10%) of 5008 captured video frames.
Backyard, Lysterfield, Melbourne, 9.18pm, 22-05-2021.

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	Distinct awarded users	Total awarded images
Image of the day
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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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	Image of the day	Top pick	Top pick nominations	Total submitted
Backyard
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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.

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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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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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