287AU

287AU is a designation for an astronomical object, typically a minor planet or comet, within the solar system. The "AU" prefix indicates it is a potentially hazardous asteroid (PHA), meaning its orbit brings it into close proximity with Earth. Specifically, a PHA is defined as an asteroid with a minimum orbit intersection distance (MOID) of 0.05 astronomical units or less from Earth's orbit and an absolute magnitude of 22.0 or brighter. The number "287" is a sequential catalog number assigned by the Minor Planet Center, which is responsible for observing and cataloging these celestial bodies. Objects are assigned numbers sequentially as their orbits are confirmed. Therefore, 287AU represents an object that has been identified and cataloged, and whose orbital parameters suggest a potential for close encounters with Earth. Further observations are crucial to refine its orbit and assess any long-term risks. Its specific orbital characteristics, size, composition, and precise trajectory are determined through ongoing astronomical surveys and analysis.