31957

31957 is a minor planet located in the asteroid belt between the orbits of Mars and Jupiter. It was discovered on October 2, 1997, by astronomers at the Spacewatch program at Kitt Peak National Observatory in Arizona, United States. The asteroid was given the provisional designation 1997 UO₉ before being officially numbered and named.

31957 is classified as a main-belt asteroid, meaning it orbits the Sun within the region where most asteroids reside. Its orbit has a semi-major axis of approximately 2.6 astronomical units (AU), taking roughly 4.2 years to complete one revolution around the Sun. The asteroid has an eccentricity of about 0.15, indicating a moderately elliptical orbit, and an inclination of around 10 degrees relative to the ecliptic plane.

Little is known about its physical properties, but estimates suggest it has a diameter of roughly 3 kilometers. Like many asteroids, 31957 is believed to be composed of rock and metal, though its exact composition remains unconfirmed. It has not been observed to exhibit any unusual characteristics such as cometary activity or a binary companion.

The asteroid has not been named as of recent astronomical records, meaning it retains its numerical designation. Minor planets are often named by their discoverers, but this particular object has not yet received an official name from the International Astronomical Union (IAU). Observations of 31957 continue to be conducted by amateur and professional astronomers to better understand its orbital dynamics and potential physical properties.