A recently discovered asteroid will make a relatively close approach to Earth this Monday, drawing the attention of astronomers and space agencies worldwide. Despite the short cosmic distance, experts emphasize that the object represents no danger to the planet and will safely continue its journey through space.
Astronomers are keeping a watchful eye on an asteroid designated as 2026JH2, a stony body set to sweep past Earth at an estimated distance of nearly 91,593 kilometers, or roughly 56,900 miles. Calculations from the European Space Agency indicate that it will move along a path measuring about one quarter of the typical separation between Earth and the moon, ranking it among the nearest asteroid approaches documented this year. Nevertheless, researchers emphasize that it poses no threat of impact or entry into the atmosphere.
The asteroid was first detected on May 10 by researchers working with the Mount Lemmon Survey in Tucson, Arizona, one of several programs dedicated to identifying near-Earth objects. After its discovery, the object received the official designation 2026JH2 and was classified as part of the Apollo group of asteroids, a category known for following orbital paths that intersect Earth’s orbit around the sun.
NASA’s Jet Propulsion Laboratory estimates that the asteroid will make its closest pass shortly before 6 p.m. Eastern Time. While that distance may appear alarmingly close from a human perspective, astronomers note that such flybys are relatively common within the broader scale of the solar system.
Why specialists conclude there’s no real cause for concern
Planetary scientists have reassured the public that the asteroid presents no threat to Earth, pointing out that it will make a safe flyby. Richard Binzel, a professor at the Massachusetts Institute of Technology and the creator of the Torino Scale used to classify asteroid impact risks, noted that objects of similar size frequently move between Earth and the moon without causing any issues.
According to Binzel, asteroids comparable in size to a car or small bus routinely travel through Earth’s cosmic neighborhood. The main difference today is that advances in detection technology now allow astronomers to observe many of these objects that previously would have gone unnoticed.
At its nearest approach, 2026JH2 will still lie far beyond the orbital heights used by numerous geosynchronous satellites that enable telecommunications, weather prediction, and broadcasting, and researchers emphasize that the object’s path has been carefully evaluated and does not cross Earth’s trajectory.
Experts believe the asteroid originated in the main asteroid belt between Mars and Jupiter, a region where collisions among rocky objects and Jupiter’s gravitational influence have long been known to push fragments inward, sending material into the inner solar system and giving rise to many of the near-Earth asteroids that astronomers track today.
While the flyby is harmless, the event highlights the crucial role of continuous monitoring in detecting potentially dangerous objects long before they could present any real risk.
The challenge of determining an asteroid’s exact size
Despite direct observations of 2026JH2, astronomers remain unable to pin down its exact size, with current scientific assessments placing its diameter somewhere between 15 and 30 meters, a range comparable to one or two school buses, yet this approximation stays ambiguous because telescopes that operate in visible light only register the object’s brightness.
Patrick Michel, an astrophysicist and research director at France’s National Centre for Scientific Research, noted that an asteroid’s luminosity offers no straightforward indication of its dimensions, since a sizable but dark body might look dim, while a smaller, highly reflective one can easily appear more radiant.
To accurately calculate dimensions, astronomers ideally require infrared observations, which allow them to measure heat emissions more directly linked to an object’s physical size. However, infrared observations are more difficult to conduct from Earth and are not typically part of the initial discovery process for near-Earth objects.
Scientists liken the smallest projected size of 2026JH2 to the meteor that detonated over Chelyabinsk, Russia, in 2013, an incident that sent a shockwave across the region, breaking windows and injuring more than 1,000 people. At the upper limit of current estimates, the asteroid may mirror the object tied to the 1908 Tunguska event in Siberia, which leveled extensive stretches of forest.
Researchers emphasize, however, that those comparisons are purely related to size and not to danger. Unlike those historic incidents, 2026JH2 will not enter Earth’s atmosphere. Its path keeps it safely distant from the planet, eliminating the possibility of an atmospheric explosion or surface impact.
Monitoring asteroids in the coming years remains crucial
Although scientists are confident that 2026JH2 poses no current threat, experts acknowledge that predicting the long-term movement of asteroids remains a complex challenge. Orbital paths can gradually change over time due to gravitational interactions with planets and other celestial bodies.
Michel observed that although long-term trajectories can never be predicted with absolute certainty, current analyses indicate that no known asteroid poses a meaningful impact threat within the next hundred years. Planetary defense teams persistently track thousands of near-Earth objects to identify any potential shifts in their orbits.
The close flyby occurs at a time when planetary radar assets are far more limited than in past years. Jean-Luc Margot, a professor of planetary sciences at the University of California, Los Angeles, explained that the 2020 collapse of the Arecibo Observatory drastically reduced the scientific community’s radar observation capacity, and NASA’s Goldstone radar facility is also currently undergoing major repairs.
Without radar observations, astronomers encounter increased difficulty when determining the precise form, spin, and path of nearby asteroids, and while optical telescopes offer useful insights, radar systems let scientists construct much more accurate models of an object’s motion and physical characteristics.
Margot noted that astronomers have detected only a limited number of near-Earth asteroids comparable in size to 2026JH2. Since many of these bodies are quite dim and compact, they typically come to light just days before their closest flybys, becoming visible only when their brightness finally reaches the threshold of survey telescopes.
Space agencies and scientific organizations, compelled by this limitation, have expanded their funding for asteroid detection and tracking programs, and upcoming observatories together with more sophisticated sky surveys are expected to significantly elevate discovery rates in the next few years, giving researchers the means to assemble a far more thorough inventory of nearby objects.
A remarkable celestial spectacle is expected to unfold with the approach of Apophis
As 2026JH2 gains notice for its near approach, astronomers are turning their focus to an even more extraordinary event set for 2029, when a much larger asteroid called Apophis is projected to sweep past Earth at an even closer distance on April 13 of that year.
Scientists predict that Apophis will sweep past Earth at about 32,000 kilometers, bringing it nearer than certain orbiting satellites, and while this flyby is strikingly close, astronomers emphasize that it poses no danger and view it instead as a rare chance for scientific study.
The flyby of Apophis is expected to become one of the most closely observed asteroid encounters in modern history. Unlike 2026JH2, which will remain invisible to the naked eye, Apophis should be visible from parts of Europe, Africa, and the Middle East without the aid of telescopes.
Events like these offer researchers valuable opportunities to study asteroid composition, movement, and structure while refining planetary defense strategies. Each close approach improves scientific understanding of how these objects behave and how humanity could respond if a future asteroid ever posed a genuine threat.
For now, astronomers say the passage of 2026JH2 serves primarily as a reminder of the dynamic nature of Earth’s cosmic environment. Small asteroids routinely move through the solar system, and thanks to improving technology, scientists are becoming increasingly capable of spotting them before they pass nearby.
A livestream of the asteroid’s approach is expected to be broadcast by the Virtual Telescope Project from observatories in Italy, allowing astronomy enthusiasts around the world to follow the event in real time. Although the asteroid itself will remain far too dim for most people to see directly, the flyby continues to capture public curiosity about the many objects that silently travel through Earth’s neighborhood in space.
