Asteroid 2026 JH2 to pass May 18

Asteroid 2026 JH2 is due to make a close pass by Earth on Monday, May 18, after being discovered only days earlier, according to the International Astronomical Union’s Minor Planet Center and NASA tracking pages. Current estimates in public tracking data put the object at roughly 15 to 35 meters across, or about 49 to 110 feet, and its closest approach at about 90,000 kilometers from Earth. NASA’s Center for Near Earth Object Studies says such close-approach calculations are updated as new observations come in, but publicly available listings reviewed on Sunday showed no impact threat for this flyby. The pass is close in astronomical terms, but still far above Earth’s surface. ### How close is this pass, exactly? NASA and multiple astronomy tracking pages place the minimum distance near 90,000 to 91,000 kilometers, which is about 56,000 to 57,000 miles. That is well inside the Moon’s average distance from Earth, which is about 384,400 kilometers, and closer than the altitude of geostationary satellites, which orbit at roughly 35,786 kilometers above Earth’s equator. The phrase “closer than some satellites” refers to the fact that some spacecraft operate much farther out than low Earth orbit, including satellites in highly elliptical or more distant regimes. The object is still expected to remain outside the geostationary ring, based on public simulations and astronomy coverage reviewed Sunday. ### Who found 2026 JH2, and why was it only spotted now? The Minor Planet Center says 2026 JH2 was first reported by the Mount Lemmon Survey on May 10, 2026. The object’s short discovery-to-flyby timeline reflects how small near-Earth asteroids can remain faint until they move into a geometry that makes them easier to detect from Earth. NASA’s CNEOS says orbit calculations for near-Earth objects are refined continuously as additional observations are submitted. In practice, that means newly found objects can move quickly from provisional detections to well-tracked flybys over a matter of days when observatories add follow-up measurements. ### Does this asteroid pose any danger? NASA’s Sentry impact monitoring system did not indicate an impact scenario for 2026 JH2 in the material reviewed Sunday, and astronomy coverage citing current orbital solutions described the flyby as safe. Public databases list it as a near-Earth asteroid, but not one expected to hit Earth during this encounter. A size estimate of 15 to 35 meters places 2026 JH2 in the range of a small asteroid rather than a civilization-scale threat. Size estimates for newly discovered objects can change as astronomers improve brightness and orbit measurements, so early figures should be treated as approximations. ### Will people be able to see it? TheSkyLive’s public page for 2026 JH2 listed the asteroid near magnitude 18 on May 17, which is too faint for unaided viewing and generally beyond casual backyard observation. Public summaries cited by science outlets said it could brighten significantly near closest approach, potentially making it accessible to small telescopes under dark skies. The Virtual Telescope Project’s WebTV page listed an online observation for “Near-Earth Asteroid 2026 JH2” on May 18 starting at 19:45 UTC. That gives viewers a way to follow the event without specialized equipment. ### Why do these close passes get so much attention? NASA’s Center for Near Earth Object Studies says it tracks close approaches because near-Earth objects can pass within lunar distance and because orbit updates are part of planetary defense monitoring. A flyby like 2026 JH2 draws notice because it combines a small object, a recent discovery date and a relatively tight pass in a short time window. On May 18, astronomers are expected to continue refining the object’s trajectory as the asteroid moves past Earth and out along its orbit. The Virtual Telescope Project’s scheduled stream begins at 19:45 UTC, and NASA and Minor Planet Center databases are likely to update as additional observations are logged.