Craterra

Montes Apenninus

Conon: A Sharp-Rimmed Crater in the Apennine Foothills

Formed during the Copernican period, the 21-kilometer crater features an asymmetric floor and an association with the nearby rille Rima Conon.

Feature Profile & Selenographic Data

Feature type
crater
Coordinates
21.66° N · 1.95° E
Diameter
20.96 km
IAU approval
1935/01/01 00:00:00
LAC quadrangle
LAC-41 · Montes Apenninus
Geological Period
Copernican

Geological Chronicle

Conon is an impact crater situated along the eastern foothills of the Montes Apenninus range, measuring 20.96 kilometers across according to planetary nomenclature records. Immediately west of the feature rises the mountainous ridge Mons Bradley, while the named craters Galen and Aratus lie roughly 70 kilometers to the east and northeast.

The crater was excavated during the young Copernican period, leaving a sharply defined rim with little degradation from subsequent impacts. Because it formed across rugged and uneven terrain, the crater floor forms an irregular oval rather than a symmetric circle, containing uneven ground without a prominent central peak. To its south in Sinus Fidei lies Rima Conon, a sinuous rille named for the formation.

Italian astronomer Giovanni B. Riccioli introduced the name in 1651 for an adjacent bay feature, honoring the third-century BCE Greek astronomer Conon of Samos. The International Astronomical Union formally adopted the name in 1935 for the crater itself.

Chronology & Exploration

  1. 1651 Early Lunar Mapping

    Giovanni B. Riccioli uses the name Conon for a bay southwest of Mons Bradley.

  2. 1935 IAU Formal Adoption

    The International Astronomical Union officially ratifies Conon as the crater's designation.

Scientific Sources & References

Name Origin

Conon of Samos; Greek astronomer (c. 260 B.C.).

Interactive Lunar Surface

Explore Conon in 3D

Inspect lunar elevation data and the official selenographic position.