286721

286721 is an asteroid from the outer regions of the asteroid belt, approximately 2 to 5 kilometers in diameter. It was discovered on September 21, 2003, by astronomers of the Catalina Sky Survey at the Mount Lemmon Observatory in Arizona. The asteroid's orbit is characterized by a semi-major axis of 3.17 AU, an eccentricity of 0.09, and an inclination of 11.8 degrees. These orbital parameters place it firmly within the main asteroid belt, though it resides in its outer reaches.

Spectroscopic analysis suggests that 286721 is likely a C-type asteroid, indicating a composition rich in carbonaceous materials. Such asteroids are typically dark and may contain water ice and organic compounds. Further observations are needed to refine its spectral classification and better understand its surface properties. As of current knowledge, 286721 has not been assigned a specific thematic name, a common practice for asteroids that have not yet undergone detailed characterization or have not been selected for specific naming conventions. Its numbered designation indicates it is a confirmed minor planet.