Endymion 53.9°N, 57.0°E

With a favourable libration, Endymion is a very conspicuous complex crater on the Moon's northern limb. It has a diameter of 123 km and is 2.8 km deep. The crater's floor is smooth and has been flooded with unusually dark lava; there have been landslides in several places along the walls. The crater was formed during the Nectarian period. Large apertures reveal a few small and minute craters. Three small craters that are almost the same size lie directly to the west of the inner crater wall. Under high solar illumination, a system of bright rays of ejecta, of unknown origin, becomes visible crossing the crater.

Mare Humboldtianum 56.8°N, 81.5°E

Mare Humboldtianum, ‘Humboldt Sea’, is a difficult object for terrestrial observers, because it lies right on the Moon's northeastern limb. Part of it stretches onto the lunar farside, and as a result, favourable observational conditions are very closely linked to the libration. Mare Humboldtianum is the central, lava-flooded area of an impact bas in with several outer rings (i.e., a multi-ring basin), with an overall diameter of 640 km. The lava-covered surface has a diameter of about 270 km. With a favourable libration, larger telescopes clearly show individual structures within the Mare, and under high angles of illumination parts of the lava flow are crossed by bright rays.

de la Rue 59.1°N, 52.3°E

A large, heavily destroyed walled-plain with a diameter of 136 km, and both large and small craters on the floor. The crater is named after Warren de la Rue, a British amateur astronomer (1815–1889), who, amongst other things, was a pioneer of lunar photography.