Lacus Spei

Lacus Spei

Clementine mosaic
Coordinates	43°00′N 65°00′E / 43.0°N 65.0°E / 43.0; 65.0Coordinates: 43°00′N 65°00′E / 43.0°N 65.0°E / 43.0; 65.0
Diameter	80 km
Eponym	Lake of Hope

Oblique view from Lunar Orbiter 4

Oblique view from Apollo 16

Lacus Spei /ˈleɪkəs ˈspiːaɪ/ (Latin speī, "Lake of Hope") is a small lunar mare that is located in the northeastern part of the Moon's near side. To the north is the crater Mercurius and to the west-southwest lies Schumacher.

The selenographic coordinates of this feature are 43.0° N, 65.0° E, and it lies within a diameter of 77 km.^[1] The main part of the lake occupies a region averaging about 50 km in diameter, with an extension leading to the northeast. The surface has the same low albedo as the larger mare features on the Moon, becoming lighter in hue near the edges. The only feature on this bay is the circular, cup-shaped satellite crater Zeno P. The crater Zeno lies to the east-northeast, closer to the lunar limb.

References[]

Lacus Spei - Lake of Hope, image using amateur telescope setup