LPOD Photo Gallery Lunar Orbiter Images Apollo Images
- Apollo 15's southward looking Fairchild-camera frames AS15-M-2599, 2600, 2601, and 2602 show Diophantus during the local morning light. Diophantus is the pronounced crater in the foreground, near the upper margin. Research Danny Caes.
(IAU Directions) DIOPHANTUS.--Forms with Delisle, its companion on the N., a noteworthy object. It is about 13 miles in diameter, with a wall, which has a distinct break in its continuity on the N., rising about 2,500 feet above the Mare. A rill-valley runs from the W. side of the ring towards the E. face of a triangular-shaped mountain on the W. of a line joining the formation with Delisle. North are three bright little craters in a line, the middle one being much the largest. From the most westerly of these objects a light streak may be traced under a high sun, extending for many miles to another small crater on the N.E. of Diophantus, and expanding at a point due N. of the formation into a spindle-shaped marking. At sunrise, the E. portion of the streak has all the appearance of a cleft, with a branch about midway running to the S. side of Delisle. Under the same phase a broad band of shadow extends from the N.W. wall to the triangular mountain just mentioned, representing a very sudden drop in the surface--resembling on a small scale the well-known "railroad" W. of Thebit. Diophantus has no central mountain.
- Depth data from Kurt Fisher database
Pike, 1976: 3.02 km
Arthur, 1974: 2.97 km
Westfall, 2000: 3.02 km
Viscardy, 1985: 2.97 km
Cherrington, 1969: 2.59 km
- Diophantus and A and B are thermal anomaly craters, implying youthful ages - Moore et al, 1980
- Included in ALPO list of bright ray craters
Diophantus of Alexandria (b. between 200 and 214, d. between 284 and 298 AD), sometimes called "the father of algebra", was a Hellenistic mathematician.
A Portfolio of Lunar Drawings (Harold Hill), pages 72, 73.