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 initially spotted on May 10 by researchers from the Mount Lemmon Survey in Tucson, Arizona, a program among several focused on tracking near-Earth objects, and after being found, it was officially named 2026JH2 and identified as a member of the Apollo asteroid group, which is characterized by orbits that cross Earth’s path around the sun.
According to NASA’s Jet Propulsion Laboratory, the asteroid is expected to make its closest pass shortly before 6 p.m. Eastern Time, and although this moment may seem alarmingly close from a human perspective, astronomers note that events of this kind happen rather frequently across the vast stretches of the solar system.
Why experts believe there is nothing to worry about
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.
Binzel notes that asteroids roughly the size of a car or small bus regularly move through Earth’s celestial vicinity, and what distinguishes the situation today is that enhanced detection technologies now let astronomers identify many of these objects that would previously have escaped notice.
At its closest pass, 2026JH2 will remain well beyond the altitude range where numerous geosynchronous satellites operate to support telecommunications, weather forecasting, and broadcasting, and specialists highlight that the object’s trajectory has been rigorously examined and does not intersect Earth’s orbit.
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
Although 2026JH2 has been observed directly, astronomers still cannot determine its precise dimensions, with current scientific estimates suggesting a diameter between 15 and 30 meters—roughly the length of one or two school buses—yet this figure remains uncertain because visible‑light telescopes capture only how bright the object appears.
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.
Astronomers can more precisely determine an object’s dimensions when they obtain infrared data, since this kind of observation captures heat signatures that correlate closely with an object’s actual size. Yet conducting infrared studies from Earth is considerably more challenging, so such measurements are usually absent during the initial detection of near‑Earth objects.
Scientists compare the smallest anticipated size of 2026JH2 to the meteor that exploded above Chelyabinsk, Russia, in 2013, an event that unleashed a shockwave across the area, shattering windows and injuring more than 1,000 people. At the higher end of current projections, the asteroid could resemble the object linked to the 1908 Tunguska event in Siberia, which flattened vast expanses 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
Scientists remain confident that 2026JH2 currently poses no danger, yet experts admit that forecasting an asteroid’s long-term trajectory is inherently difficult, as orbital routes can shift over the years through gravitational pulls from planets and other cosmic objects.
Michel noted that while future trajectories can never be forecast with complete certainty indefinitely, no known asteroid currently presents a significant collision risk within the next century based on existing calculations. Planetary defense programs continue to monitor thousands of near-Earth objects to detect any future changes in their paths.
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 explained that astronomers have identified only a small set of near-Earth asteroids similar in size to 2026JH2, and because many of these objects remain faint and compact, they are often spotted just days before their closest approaches, becoming detectable only when their brightness finally meets survey telescope limits.
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 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 estimate that Apophis will pass roughly 32,000 kilometers from Earth, placing it closer than some satellites that circle the planet, and although this approach is remarkably near, astronomers stress that it presents no threat and regard it instead as an exceptional scientific opportunity.
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 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 explain that the arrival of 2026JH2 chiefly underscores the constant shifts in Earth’s cosmic surroundings, where small asteroids routinely move through the solar system, and advancing technology enables scientists to spot them well before any close encounter occurs.
A live broadcast of the asteroid’s arrival is expected to be shown by the Virtual Telescope Project via its observatories in Italy, giving astronomy fans worldwide the chance to watch the moment as it unfolds in real time. Even though the asteroid will be far too faint for most viewers to spot on their own, the close pass continues to spark public fascination with the countless objects that quietly move through the region of space surrounding Earth.
