Autolycus

A small but prominent crater on Mare Imbrium, south of Aristillus.


Object Type: Lunar Impact Crater

Size: 39 km diameter

Location: Chattanooga, TN (35.15°N, 85.32°W)

Equipment: Telescope (750/150mm)

Visual Description

Autolycus appeared as a compact, well-formed crater on the dark mare surface. Though smaller than nearby Aristillus, the crater was distinct with sharp walls and a relatively flat floor. The crater formed a notable geometric arrangement with Aristillus to the north and Archimedes to the west.

Notable Features

  • Small but well-preserved structure
  • Sharp, distinct rim
  • Located on Mare Imbrium
  • Part of the famous Archimedes-Aristillus-Autolycus triangle
  • Relatively flat floor without central peak

Notes

  • Named after Greek astronomer Autolycus of Pitane
  • Best observed 7-9 days after new moon
  • Excellent landmark for locating Archimedes and Aristillus
  • Coordinates: 30.7°N, 1.5°E
  • Smaller companion to Aristillus