25812

25812 (1999 EL12) is a minor planet located in the main asteroid belt between Mars and Jupiter. It was discovered on 10 April 1999 by the Lincoln Near‑Earth Asteroid Research (LINEAR) survey at the Lincoln Laboratory's Experimental Test Site in Socorro, New Mexico. The discovery was confirmed by additional follow‑up observations, allowing the Minor Planet Center to assign it the permanent number 25812.

The orbit of 25812 is moderately eccentric, with an eccentricity of 0.12, and it has a semi‑major axis of approximately 2.40 AU, placing it well within the central region of the asteroid belt. Its orbital period is roughly 3.71 years, and it has an inclination of about 4 degrees relative to the ecliptic plane. These orbital parameters categorize it as a background asteroid rather than a member of a specific dynamical family.

Physical studies of 25812 are limited; however, photometric observations from surveys in the early 2000s suggest it is likely an S‑type (stony) asteroid, though confirmation requires spectroscopic data. The estimated diameter, based on its absolute magnitude of 13.6 and an assumed albedo typical for S‑type asteroids, is around 6–8 kilometers. No spacecraft missions have visited 25812, and it remains one of the many small bodies observed primarily for its motion and brightness.

The minor planet was officially named in 2001 in honor of the Japanese astronomer Yoshikazu Kiyokawa, who contributed significantly to the study of main‑belt asteroid dynamics. The name was adopted by the Committee on Small Body Nomenclature of the International Astronomical Union, and the formal citation appears in the Minor Planet Circulars. No further designations or naming rights have been assigned since. The object continues to be observed occasionally by both professional and amateur astronomers to refine its orbit and physical characteristics.