Plinius 15.4°N, 23.7°E

A very conspicuous crater with a diameter of 43 km, a central peak and terraced inner walls. The central peak, which has partially destroyed slopes that are clearly visible under low illumination, exhibits a summit crater, and directly alongside lies a crater pit. A system of parallel, linear rilles – the Rimae Plinius, with an overall length of about 124 km – lies to the north of Plinius and intersect some of the mare wrinkle ridges.

The crater is named after Gaius Plinius Secundus (23 to 79 AD). Pliny was the author of a 37-volume encyclopaedia, entitled ‘Naturalis Historia’. He died during the eruption of Vesuvius that destroyed Pompeii.

Jansen 13.5°N, 28.7°E

A lava-flooded crater with flat walls and a diameter of 23 km, not to be confused with the large complex crater Janssen in the southern highlands at 45.4°S, 40.3°E. Northeast of Jansen lies the sinuous rille Rima Jansen with a length of about 35 km. In the nearby surroundings a few other submerged ghost craters may be observed.

Ross 11.7°N, 21.7°E

A crater that is 24 km in diameter, not to be confused with the small crater Rosse in Mare Nectaris.

Lamont

4.4°N, 23.7°E

Lamont is a unique feature on the nearside of the lunar surface. It is probably a ghost crater completely submerged by lava, surrounded by two concentric, mare wrinkle-ridge systems, one of which shows radial structures. Lamont is the centre of a gravitational anomaly (a mascon). As a feature, Lamont is very flat, so that observation requires extreme grazing illumination.