Mare Novum

(discontinued IAU name)

Lat: 25.7°N, Long: 90°E, Diameter: km, Depth: km, Rukl: Libration Zone III (Joliot)

Clementine The IAU name referred to the mare patches on the floor of this crater, now known as Joliot.

Images

This discontinued IAU name is Latin for the "New Sea"
Mare Novum was catalog entry 140a in Blagg and Müller's Named Lunar Formations, where the "a" means it is an interpolated number that did not appear in the Collated List. The feature is described as a mare "at limb" with a latitude equivalent to 25.7°N.
The name was attributed to Franz.
In 1961 the IAU adopted the new name Joliot-Curie for a dark limb feature photographed by Luna-3, even though some scientists suspected it was the same as the IAU's earlier Mare Novum.
As part of the changes introduced in the Rectified Lunar Atlas and System of Lunar Craters accepted by the IAU in 1964, Arthur suggested redefining the name Joliot-Curie (presently Joliot) to mean the 143 km diameter crater containing Luna-3's Joliot-Curie and the IAU's former Mare Novum on its floor.