Difference between revisions of "Diophantus"
| Line 14: | Line 14: | ||
<br /> | <br /> | ||
==Description: Elger== | ==Description: Elger== | ||
| − | ''([[IAU% | + | ''([[IAU%20directions|IAU Directions]])'' DIOPHANTUS.--Forms with [[Delisle|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|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|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 [[Straight%20Wall|"railroad"]] W. of [[Thebit|Thebit]]. Diophantus has no central mountain.<br /> <br /> |
==Description: Wikipedia== | ==Description: Wikipedia== | ||
[http://en.wikipedia.org/wiki/Diophantus_%28crater%29 Diophantus]<br /> <br /> | [http://en.wikipedia.org/wiki/Diophantus_%28crater%29 Diophantus]<br /> <br /> | ||
==Additional Information== | ==Additional Information== | ||
| − | * Depth data from [[Kurt%20Fisher% | + | * Depth data from [[Kurt%20Fisher%20Crater%20Depths|Kurt Fisher database]]<br /> Pike, 1976: 3.02 km<br /> Arthur, 1974: 2.97 km<br /> Westfall, 2000: 3.02 km<br /> Viscardy, 1985: 2.97 km<br /> Cherrington, 1969: 2.59 km |
* '''Diophantus''' and '''A''' and '''B''' are thermal anomaly craters, implying youthful ages - [[Moore%20et%20al%2C%201980|Moore et al, 1980]] | * '''Diophantus''' and '''A''' and '''B''' are thermal anomaly craters, implying youthful ages - [[Moore%20et%20al%2C%201980|Moore et al, 1980]] | ||
* Included in [[ALPO%20list%20of%20bright%20ray%20craters|ALPO list of bright ray craters]] | * Included in [[ALPO%20list%20of%20bright%20ray%20craters|ALPO list of bright ray craters]] | ||
Latest revision as of 01:46, 16 April 2018
Contents
Diophantus
|
Lat: 27.6°N, Long: 34.3°W, Diam: 17 km, Depth: 3.02 km, Rükl: 19, Eratosthenian |
LOIV-138-h3
Images
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.
Maps
(LAC zone 39B3) LAC map Geologic map LM map LTO map
Description
Description: Elger
(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.
Description: Wikipedia
Additional Information
- 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
Nomenclature
Diophantus of Alexandria (b. between 200 and 214, d. between 284 and 298 AD), sometimes called "the father of algebra", was a Hellenistic mathematician.
LPOD Articles
Bibliography
A Portfolio of Lunar Drawings (Harold Hill), pages 72, 73.
