Mare Nectaris

15.2°S, 35.5°E

Mare Nectaris (Sea of Nectar) is a relatively small and nearly circular lunar maria of about 350 km in diameter. It is the lava-flooded central portion of a large impact basin with an area of c. 100 000 km2. It arose in the Nectarian epoch (about 3.9 billion years ago), when the lunar surface was created, and is one of the oldest basins on the nearside of the Moon. Nectaris is a multi-ring basin identified by the ring-like arrangement of four concentric basin ramparts. Mare Nectaris is also the centre of a gravitational anomaly (a mascon).

Smaller telescopes show very few craters on the lava surface of Mare Nectaris (the largest of them is Rosse). Larger telescopes, however, show a wealth of craterlets and pits. One interesting surface feature, northeast of the crater Rosse, is a bright ray of ejecta from the Tycho impact. Large telescope reveal that, within the ray, there are many tiny secondary craters (in a so-called crater cluster).

Daguerre

11.9°S, 33.6°E

A ghost crater, 46 km in diameter, in the northern area of Mare Nectaris. A group of crater pits lies almost exactly in the centre of the crater's floor. Its southern half is crossed by the long ray of ejecta from Mädler. Directly adjoining it to the northwest lie a second, nameless ghost crater, that is very similar to Daguerre in structure.