22928

22928 is a minor planet in the asteroid belt, orbiting the Sun between Mars and Jupiter. It was discovered on October 16, 1977, by the American astronomer Eleanor F. Helin at the Palomar Observatory in California. The asteroid is approximately 10 kilometers in diameter and has an orbital period of about 4.3 years. It is classified as a main-belt asteroid, which means it orbits the Sun in the region between the orbits of Mars and Jupiter. The specific orbital elements of 22928 include a semi-major axis of approximately 2.6 astronomical units (AU), an eccentricity of about 0.15, and an inclination of around 11 degrees relative to the ecliptic plane. The asteroid's rotation period is estimated to be about 5.5 hours. 22928 has not been observed to have any known moons or companions. Its spectral type is classified as S-type, indicating that it has a stony composition. The asteroid's name is derived from the number assigned to it in the Minor Planet Center's catalog, as it has not been officially named by the International Astronomical Union.