18555

18555 is a minor planet in the asteroid belt, located between the orbits of Mars and Jupiter. It was discovered on February 18, 1997, by the Lincoln Near-Earth Asteroid Research (LINEAR) project, a collaborative effort between the United States Air Force, NASA, and MIT. The asteroid is part of the Flora family, a group of asteroids that share similar orbital elements and are believed to have originated from a single parent body.

18555 has an estimated diameter of about 4.5 kilometers, based on its absolute magnitude. Its orbit has a semi-major axis of approximately 2.2 astronomical units (AU), with an eccentricity of 0.13 and an inclination of 5.5 degrees relative to the ecliptic plane. The asteroid completes one orbit around the Sun in about 3.3 years.

The surface of 18555 is likely composed of silicate rocks and metals, typical of most asteroids in the inner asteroid belt. Its spectral classification is S-type, indicating a stony composition. The asteroid's rotation period is approximately 5.4 hours, as determined by photometric observations.

18555 does not pose any significant threat to Earth, as its orbit does not intersect with that of our planet. However, it is still an object of interest for astronomers studying the formation and evolution of the solar system. The asteroid's discovery and characterization contribute to our understanding of the diverse population of minor planets in the asteroid belt.