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 closely monitoring an asteroid known as 2026JH2, a rocky object expected to glide past Earth at an estimated distance of about 91,593 kilometers, roughly 56,900 miles. According to calculations from the European Space Agency, its trajectory will bring it to nearly one quarter of the usual gap between Earth and the moon, placing it among this year’s closest recorded asteroid flybys. Even so, researchers point out that it presents no risk of impact or atmospheric entry.
The asteroid was first observed on May 10 by researchers with the Mount Lemmon Survey in Tucson, Arizona, one of several programs dedicated to monitoring near-Earth objects, and once detected, it received the official designation 2026JH2 and was classified as part of the Apollo asteroid group, noted for having orbits that intersect Earth’s trajectory 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 experts believe there is nothing to worry about
Planetary scientists have assured the public that the asteroid poses no danger to Earth, noting it will pass by safely. Richard Binzel, a professor at the Massachusetts Institute of Technology and the creator of the Torino Scale for categorizing asteroid impact hazards, emphasized that objects of comparable size routinely travel between Earth and the moon without generating any problems.
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.
The asteroid is believed to come from the primary asteroid belt situated between Mars and Jupiter, where experts note that impacts among rocky bodies, along with Jupiter’s gravitational pull, can sometimes send debris drifting into the inner solar system, a mechanism understood for many years and credited with producing numerous near-Earth asteroids monitored by astronomers today.
Although this flyby poses no danger, the event underscores how vital ongoing monitoring efforts are for spotting potentially hazardous objects long before they pose any real threat.
The difficulty in pinpointing an asteroid’s precise dimensions
Despite direct observations of 2026JH2, astronomers still cannot determine its precise dimensions. Scientists estimate that the object measures somewhere between 15 and 30 meters in diameter, roughly equivalent to the size of one or two school buses. However, that estimate remains uncertain because telescopes observing in visible light only capture how bright the object appears.
Patrick Michel, an astrophysicist and research director at France’s National Centre for Scientific Research, explained that an asteroid’s brightness does not directly reveal its size. A darker object may appear faint even if it is relatively large, while a smaller but highly reflective asteroid could seem brighter.
Astronomers can gauge an object’s dimensions with greater accuracy when they gather infrared observations, because this type of data records heat signatures that align closely with the object’s true scale. However, carrying out infrared measurements from Earth is far more difficult, which means these readings are typically missing during the early identification of near‑Earth objects.
Scientists compare the lower end of 2026JH2’s estimated size range to the meteor that exploded over Chelyabinsk, Russia, in 2013. That event generated a shockwave that shattered windows and injured more than 1,000 people. At the higher end of the estimate, the asteroid could resemble the object associated with the 1908 Tunguska event in Siberia, which flattened vast areas of forest.
Researchers emphasize, though, that these comparisons speak only to size and not to danger, as 2026JH2 is not anticipated to pass into Earth’s atmosphere. Its path keeps it safely distant from the planet, eliminating any possibility of an airburst or impact.
Tracking asteroids in the years ahead continues to be vital
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 noted that while long-term paths can never be forecast with perfect accuracy, current assessments show that no identified asteroid is expected to pose a significant collision risk in the next century, and planetary defense teams continually monitor thousands of near-Earth objects to detect any possible changes in their trajectories.
The close flyby comes at a moment when planetary radar resources are far more constrained than in earlier years. Jean-Luc Margot, a professor of planetary sciences at the University of California, Los Angeles, noted that the 2020 collapse of the Arecibo Observatory sharply curtailed the scientific community’s radar observation capabilities. Moreover, NASA’s Goldstone radar facility is presently undergoing extensive repairs.
Without radar data, astronomers face greater challenges in pinpointing the exact shape, rotation, and trajectory of nearby asteroids, and although optical telescopes provide valuable information, radar instruments allow scientists to develop far more precise representations of an object’s movement and physical properties.
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.
This limitation has encouraged space agencies and scientific organizations to invest more heavily in asteroid discovery and tracking programs. New observatories and next-generation sky surveys are expected to improve detection rates significantly over the coming years, allowing researchers to build a more complete inventory of nearby objects.
A historic celestial display is anticipated from Apophis
As 2026JH2 draws increasing attention for its close flyby, astronomers are already shifting their gaze toward an even more remarkable occurrence expected in 2029, when a significantly larger asteroid named Apophis is predicted to pass Earth at an even nearer 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 anticipated Apophis flyby is poised to rank among the most intensively monitored asteroid events in contemporary history, and unlike 2026JH2, which will stay hidden from unaided vision, Apophis is expected to be seen from various regions across Europe, Africa, and the Middle East without the use of telescopes.
Events like these provide researchers with vital opportunities to study an asteroid’s makeup, trajectory, and internal characteristics, helping to push planetary defense efforts forward, and each close approach broadens scientific understanding of how such objects behave and how humanity could respond if one ever posed a genuine threat.
For now, astronomers note that the arrival of 2026JH2 mainly highlights how constantly Earth’s cosmic surroundings shift. Small asteroids travel through the solar system on a regular basis, and with advancing technology, scientists are growing ever more adept at detecting them well before they make close approaches.
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.
