Thebit is a lunar impact crater located on the southeast shore of Mare Nubium.

The rim of Thebit is generally circular in outline, with a double-notch in the southwest wall.

Due west of Thebit is a 110-kilometer-long ridge named Rupes Recta, which rises to 240 meters.

[1] Thebit is a Latinization of the name of the 9th century Iraqi astronomer and mathematician Thābit ibn Qurra.

[2] By convention these features are identified on lunar maps by placing the letter on the side of the crater midpoint that is closest to Thebit.