Today's Close Approaches

A "close approach" occurs when a near-Earth object passes within a defined distance of our planet. NASA's Center for Near Earth Object Studies (CNEOS) tracks all known asteroids and comets that come within 0.05 AU (approximately 7.5 million kilometers) of Earth's orbit. Distances are commonly expressed in lunar distances (LD) -- where 1 LD equals roughly 384,400 km, the average Earth-Moon distance -- making it easier to grasp the scale. An asteroid at 10 LD is about 3.84 million kilometers away, which in cosmic terms is remarkably close but still poses no collision risk for any object currently being tracked.

This page shows live data from NASA's NeoWs (Near Earth Object Web Service) API, refreshed on every page load. Each asteroid listed below has had its orbit calculated from multiple telescope observations. The table includes miss distance, estimated size range, relative velocity, and hazard classification. An object labeled "PHA" (Potentially Hazardous Asteroid) has a diameter estimated at 140 meters or larger and a minimum orbit intersection distance of 0.05 AU or less -- but this classification refers to the orbit's geometry, not an imminent threat.