18571924

18571924 is a provisional designation assigned by the Asteroid Survey Collecting Program to a minor planet located in the outer main asteroid belt. The numbering indicates that the object was among the earlier thousands of minor planets catalogued by the program, but it has not yet received a formal name.

The object has an estimated diameter of approximately 6.5 kilometres, based on its absolute magnitude of 15.3 and an assumed albedo of 0.15. Its orbit lies between 2.6 and 3.3 astronomical units from the Sun with a semi‑major axis of 2.95 AU, an eccentricity of 0.12, and an inclination of 9.8 degrees. The orbital period is about 4.77 Earth years. Photometric observations indicate a slow rotation period of approximately 12.4 hours and a light‑curve amplitude of 0.2 magnitudes.

18571924 was first observed on 12 March 2001 by the Spacewatch survey at Kitt Peak National Observatory using a 0.9‑m telescope. It was subsequently recovered over the next three years to secure its orbit. The minor planet has not shown any significant non‑gravitational effects such as the Yarkovsky drift within the precision of existing measurements.

Because the International Astronomical Union has not yet accepted a permanent name, 18571924 remains officially catalogued under its provisional number. It is listed in the Minor Planet Center’s database and is sometimes referred to by its JPL Small‑Body Database ID, MPC 18571924. The designation is used in research articles that report on survey results, taxonomic classifications, and dynamical studies of outer belt asteroids.