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Published online by Cambridge University Press: 05 October 2012
Schiller 51.9°S, 39.0°W
Schiller is one of the few truly elliptical craters, having measurements of 70 × 180 km. The southern portion of the crater's floor is smooth and level, the northern portion is rough and furrowed and has two mountain peaks. Schiller probably once consisted of two or more overlapping craters. NASA experiments in the 1960s have shown that such a structure may result from a further impact that occurs at a very low angle (of just a few degrees), and may perfectly well lead to a form of crater like Schiller.
Schiller-Zucchius Basin
The region between the craters Schiller and Zucchius is a multiring basin with two, or possibly three, concentric rings of mountain chains (basin ramparts). The inner ring, about 200 km in diameter, cuts the crater Segner, and the second ring, about 330 km in diameter, cuts across the crater Zucchius. Like many other basins, the Schiller-Zucchius Basin also shows a gravity anomaly (a mascon).
Bailly 66.5°S, 69.1°W
Bailly is the largest crater that may be observed on the nearside of the Moon (and is described on older Moon maps as a walled plain). Nevertheless, because of its extreme position on the limb it is not very conspicuous, and because of the curvature of perspective at the limb is distorted into an extremely elliptical shape. Bailly has a diameter of nearly 300 km, and as such is classified as a medium-size impact basin.
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