Fracastorius Crater (Bruce Rohrlach)

Contains: Solar system body or event

Fracastorius Crater

Acquisition type: Lucky imaging

Fracastorius Crater

Acquisition type: Lucky imaging

Fracastorius imaged on Friday night. Located at the southern end of Mare Nectaris (“Sea of Nectar”), the crater rim on its north side is very low and flooded by the magma ocean that once occupied Mare Nectaris. The southern crater walls (top end of the crater) are much higher, rising up to a mile or more above the crater floor. Under grazing sunlight an east-west rille system traverses the floor of the crater. Several tiny hills are scattered on the floor of Fracastorius.

The small crater that lies in isolation on the basalt plains of Mare Nectaris (centre of lower left quadrant) is the 11-km-wide Rosse crater, and given its 2.4 km depth below the floor of Mare Nectarius, you could fit a mountain 200m’s higher than Australia’s highest mountain, Mt Kosciuszko.

The larger crater in the lower right is Beaumont, named after the French Geologist (1798-1874) Jean-Baptiste-Armand-Louis-Leonce Eile de Beaumont (what a name!).

SW 8 inch/f5, ASI1600mm Pro, TVue 5x, Focal length 7000 mm.
Lysterfield, Victoria, Australia, 13-08-2021.
Stack: 500 (13.8%) of 3633 frames captured at 30 fps.

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	Image of the day	Top pick	Top pick nominations	Total submitted
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	Image of the day	Top pick	Top pick nominations	Total submitted
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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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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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Astrometry.net job	n/a
PixInsight job	n/a
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