18259

18259 is a minor planet in the asteroid belt, located between the orbits of Mars and Jupiter. It was discovered on October 16, 1960, by the Indiana Asteroid Program at Goethe Link Observatory in Indiana, United States. The asteroid is approximately 10 kilometers in diameter and has a rotation period of about 5.6 hours. It is classified as a C-type asteroid, which means it has a carbonaceous composition and a dark surface. The asteroid's orbit is relatively stable, with an eccentricity of 0.12 and an inclination of 10.7 degrees relative to the ecliptic plane. 18259 has not been visited by any spacecraft, and its surface features remain unknown. The asteroid's name is derived from the Indiana Asteroid Program's naming convention, which assigns numbers to asteroids discovered by the program.