Eratosthenes

A prominent crater marking the boundary between Mare Imbrium and the Montes Apenninus range.

Visual Description

Eratosthenes appeared as a deep, well-preserved crater at the southern end of the Montes Apenninus mountain range. The crater showed excellent terraced walls and a prominent central peak complex. Its strategic location at the edge of Mare Imbrium made it a prominent landmark, and the crater’s relatively young age was evident in its sharp, well-defined features.

Notable Features

• Excellent terraced walls with multiple levels
• Prominent central peak complex
• Located at terminus of Montes Apenninus
• Deep crater with well-preserved structure
• Strategic location between mare and highlands

Notes

• Named after Greek mathematician Eratosthenes
• Best observed 9-10 days after new moon
• Marks the boundary of Mare Imbrium
• Coordinates: 14.5°N, 11.3°W
• Used to define geological periods (Eratosthenian Era)