Asteroid 2026 JH2 will pass Earth at 56,000 miles

The Minor Planet Center logged asteroid 2026 JH2 after initial observations by the Mount Lemmon Survey on May 10, and European Space Agency tracking shows the object making a close Earth pass on May 18. ESA’s close-approach table lists the miss distance at 91,583 kilometers, or about 56,900 miles, from Earth’s center at 21:58 UTC. The object is small by asteroid standards, with ESA estimating a diameter of 14 to 30 meters. Astronomers said the flyby poses no impact threat to Earth. ### How close is this compared with the Moon? ESA put 2026 JH2’s distance at 0.238 lunar distances, meaning it will pass at about 24% of the average Earth-moon distance. That places the asteroid well inside the orbit of geostationary satellites, which circle Earth at roughly 35,786 kilometers above the surface, though the asteroid remains far above the atmosphere. (minorplanetcenter.net) The close pass is unusual but not unprecedented. ESA’s close-approach list labels the event with a negative close-approach index value, indicating a comparatively uncommon encounter for an object of this size and speed. ### Who found 2026 JH2, and when? The Minor Planet Center said the Mount Lemmon Survey in Arizona made the initial reported observation on 2026-05-10. (neo.ssa.esa.int) A Minor Planet Electronic Circular issued on May 12 listed follow-up measurements from Mount Lemmon, Farpoint Observatory in Kansas and Magdalena Ridge Observatory in New Mexico, among others, used to establish the object’s orbit. The MPC database classifies 2026 JH2 as a near-Earth object and gives it an Earth minimum orbit intersection distance of about 0.00073 astronomical units. The object’s current orbit solution is based on a short observation arc, which is typical for a newly discovered asteroid found only days before a flyby. (minorplanetcenter.net) ### How big is the asteroid? ESA’s close-approach table estimates the asteroid at 14 to 30 meters across. A Space.com report, republished by RocketNews, cited follow-up observations that put the size in a similar 16-to-35-meter range based on brightness. At that size, 2026 JH2 is far smaller than the asteroid linked to dinosaur extinction and closer to the scale of objects that astronomers track as local hazards because they can approach Earth with little warning. (minorplanetcenter.net) The Minor Planet Center lists its absolute magnitude at 26.14, a measure astronomers use with assumptions about reflectivity to estimate diameter. (neo.ssa.esa.int) ### Can people actually watch it? The Virtual Telescope Project scheduled a livestream for May 18 beginning at 19:45 UTC, or 3:45 p.m. EDT. In comments reported by Space.com and reproduced by RocketNews, project founder Gianluca Masi said the asteroid would be near minimum distance and near peak brightness during the observation window. (minorplanetcenter.net) ESA’s table lists the object’s maximum brightness near magnitude 11.7, which is too faint for the unaided eye but within reach of small telescopes under favorable skies. Masi said the asteroid would appear as a moving point of light against the background stars as the telescope tracks it. ### Does this flyby change anything for Earth? (rocketnews.com) ESA’s close-approach data and the Virtual Telescope Project description both describe the encounter as safe. No source reviewed here lists 2026 JH2 on an impact-risk page for this pass, and the event is being treated as an observation opportunity rather than a planetary-defense emergency. (neo.ssa.esa.int) On May 18, the next concrete milestone is closest approach at 21:58 UTC in ESA’s table, followed by the Virtual Telescope Project’s live coverage beginning at 19:45 UTC with commentary by Gianluca Masi. (neo.ssa.esa.int)