Tags: Asteroid.
12357 Toyako (provisional designation: 1993 ST1) is a main-belt minor planet. It was discovered by Kin Endate and Kazuro Watanabe at the Kitami Observatory in Hokkaidō Japan on September 16 1993. It is named after Lake Tōya a volcanic caldera lake in Japan’s Shikotsu-Tōya National Park.