Asteroid 2026JH2 will pass Earth next week at a distance closer than the Moon's orbit, New Scientist reports. The object carries sufficient mass to destroy an entire city if it struck land.
The asteroid remains in a safe trajectory and poses no collision risk during this approach. However, its proximity underscores how near-Earth objects regularly traverse the inner solar system, some on orbits that bring them dangerously close to our planet.
Astronomers have catalogued thousands of near-Earth asteroids. Most pose no threat, but their movements require constant monitoring. Space agencies including NASA and the European Space Agency track these objects to identify any that might alter their trajectories due to gravitational interactions or collisions with other space rocks.
The specifics of 2026JH2's size, composition, and exact closest approach distance determine its destructive potential. City-killer asteroids typically measure 140 meters or larger. Historical impacts like the Tunguska event of 1908, likely caused by a much smaller object, flattened 80 million trees across Siberia. A larger impact in densely populated regions would cause catastrophic casualties.
This flyby provides an opportunity for ground-based and space-based observatories to refine their measurements of the asteroid's physical properties and orbit. Such observations improve models predicting future close approaches and help scientists assess whether mitigation strategies might ever become necessary.
The upcoming pass also highlights the value of planetary defense research. NASA's DART mission, which successfully impacted asteroid Dimorphos in 2022, demonstrated that kinetic impact can alter an asteroid's trajectory. Similar techniques could theoretically deflect dangerous objects, provided sufficient warning time exists.
Near-Earth asteroids present both scientific interest and existential consideration for human civilization. While next week's encounter carries no danger, it serves as a reminder that Earth shares its orbital neighborhood with