21339

21339 is a minor planet in the asteroid belt, located between the orbits of Mars and Jupiter. It was discovered on September 13, 1997, by astronomers at the Lincoln Laboratory ETS in Socorro, New Mexico. The asteroid is part of the Flora family, a group of asteroids that share similar orbital elements and spectral characteristics. The Flora family is believed to have originated from a large parent body that was disrupted by a collision.

21339 has an estimated diameter of about 5 kilometers and an orbital period of approximately 3.6 Earth years. Its orbit is inclined at an angle of about 1.5 degrees to the ecliptic plane, and it has an eccentricity of 0.15. The asteroid's spectral type is S, indicating that it has a stony composition. This is typical for asteroids in the Flora family.

The designation 21339 is part of the Minor Planet Center's system for naming asteroids. The number is assigned sequentially as new asteroids are discovered, and it does not have any specific meaning or significance beyond its role in identifying the asteroid. The asteroid has not been named, and it is referred to by its number in scientific literature and databases.

21339 is one of many thousands of asteroids in the asteroid belt, and it plays a role in our understanding of the solar system's formation and evolution. By studying the composition and orbits of asteroids like 21339, astronomers can gain insights into the processes that shaped our planetary system.