![]() Lunar Orbiter 4 image | |
Coordinates | 30°42′N1°30′E / 30.7°N 1.5°E /30.7; 1.5 |
---|---|
Diameter | 39 km |
Depth | 3.4 km |
Colongitude | 358° at sunrise |
Eponym | Autolycus |
Autolycus is alunarimpact crater that is located in the southeast part ofMare Imbrium. The crater is named after the ancient Greek astronomerAutolycus of Pitane.[1] West of the formation isArchimedes, a formation more than double the size of Autolycus. Just to the north isAristillus, and the outer ramparts of these two craters overlap in the intermediate stretch of thelunar mare.
The rim of Autolycus is somewhat irregular, although generally circular overall. It has a small outer rampart and an irregular interior with no central peak. It possesses a lightray system that extends for a distance of over 400 kilometers. Due to its rays, Autolycus is mapped as part of theCopernican System.[2] Some of the ray material appears to overlay the flooded floor of Archimedes, and thus Autolycus is older than Archimedes. Aristillus (to the north), however, has rays that overlay both Autolycus and Archimedes, and thus it is the youngest of the three craters.
The first man-made impact upon the Moon was when theLuna 2 probe crash-landed just to the west-southwest of the crater rim on September 13, 1959,[3] according to the claim of one Hungarian astronomer who claimed to see an explosion of dust.
By convention these features are identified on lunar maps by placing the letter on the side of the crater midpoint that is closest to Autolycus.
Autolycus | Latitude | Longitude | Diameter |
---|---|---|---|
A | 30.9° N | 2.2° E | 4 km |
K | 31.2° N | 5.4° E | 3 km |
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