Proclus

A brilliant young crater on the western shore of Mare Crisium, notable for its bright rays and unusual asymmetric ray pattern.

Visual Description

Proclus appeared as an exceptionally bright crater on the western edge of Mare Crisium, standing out dramatically against both the dark mare and surrounding highlands. The crater displayed a sharp rim and bright interior, indicating its relative youth. Most distinctive was its asymmetric ray system, with bright rays extending primarily to the south and west, while notably absent to the north and east—an unusual pattern suggesting an oblique impact angle.

Notable Features

• Extremely bright, young crater
• Sharp, well-preserved rim
• Asymmetric ray pattern
• Rays primarily south and west
• Located on Mare Crisium shore

Notes

• Named after Greek philosopher Proclus
• Unusual asymmetric ray pattern
• Best observed 4-6 days after new moon
• Coordinates: 16.1°N, 46.8°E
• One of the brightest craters on the Moon