22258

22258 is a minor planet in the asteroid belt, orbiting the Sun between Mars and Jupiter. It was discovered on September 24, 1973, by the Soviet astronomer Tamara Mikhaylovna Smirnova at the Crimean Astrophysical Observatory in Nauchnyj, Ukraine. The asteroid is classified as a main-belt asteroid, with a semi-major axis of approximately 2.7 astronomical units (AU). Its orbital period is about 4.5 Earth years, and it has an eccentricity of 0.11. The asteroid's absolute magnitude is 13.7, indicating a diameter of roughly 6.7 kilometers. 22258 has a relatively slow rotation period of about 24 hours. The asteroid's spectral type is not well-determined, but it is likely an S-type asteroid, which are composed of silicate materials. As of now, no moons have been discovered orbiting 22258. The asteroid's name is not yet assigned, and it is designated by its provisional designation (22258) 1973 SX1.