The great Moretus crater (Bruce Rohrlach)

Contains: Solar system body or event

The great Moretus crater

Acquisition type: Lucky imaging

The great Moretus crater

Acquisition type: Lucky imaging

The great Moretus crater near the lunar south pole, a 5 km deep crater with its central peak rising to 2.1 km and casting a triangular late afternoon shadow across the crater floor (a favourite feature for amateur lunar photographers to capture in the lunar early morning or late afternoon).

For scale - Moretus is almost as large as The Big Island in Hawaii.

In the foreground to Moretus are Curtius and Zach (near bottom), to the right are Cysatus and Gruemberger, the edge of Klaproth and Casatus at top. Behind Moretus to the upper left and closer to the lunar pole are Short and Newton.

The lower-left most peak of the three peaks on the horizon is the Malapert Massif. The relief is amazing. Going from the floor of Haworth crater (at the far side of the Malapert Massif) to the top of the Massif is a single near-uninterrupted slope with 8 km of elevation change (equivalent to going from sea-level to near the top of Mt Everest). The massif is part of the mountain ranges that were thrown up as part of the huge impact that formed the Aitken Basin centred on the South Pole.

Skywatcher 8 inch f5 Newtonian, ASI1600mm Pro (ZWO red filter).

Phillip Island, Victoria, Australia (04-04-2021).

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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.
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