Selenographic coordinate system

The selenographic coordinate system is used to refer to locations on the surface of Earth's moon.

Any position on the lunar surface can be referenced by specifying two numerical values, which are comparable to the latitude and longitude of Earth.

Astronomers defined the fundamental location in the selenographic coordinate system by the small, bowl-shaped satellite crater 'Mösting A'[citation needed].

For precise applications, many coordinate systems have been defined for the Moon, each with a slightly different prime meridian.

[2] The selenographic colongitude is the longitude of the morning terminator on the Moon, as measured in degrees westward from the prime meridian.