Lunar 100 – Object 88
Peary is a large, heavily foreshortened crater located almost exactly at the lunar north pole, making it one of the most difficult major craters to observe from Earth. Its interior lies in permanent or near‑permanent shadow, while its rim is illuminated only under very favorable libration, revealing a rugged, irregular outline shaped by extreme polar geometry. Peary is included in the Lunar 100 because it is a difficult‑to‑observe polar crater, demonstrating the challenges of studying features located at the very edge of the lunar disc.