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 say there is no reason for concern
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 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.
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 note, however, that these comparisons refer solely to scale rather than risk. In contrast to those past events, 2026JH2 is not expected to enter Earth’s atmosphere. Its trajectory ensures a secure distance from the planet, removing any chance of an airburst or ground collision.
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 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 also arrives at a time when planetary radar capabilities are more limited than in previous years. Jean-Luc Margot, a professor of planetary sciences at the University of California, Los Angeles, pointed out that the collapse of the Arecibo Observatory in 2020 significantly reduced the scientific community’s radar observation capacity. In addition, NASA’s Goldstone radar facility is 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 historic celestial display is anticipated from 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 travel within approximately 32,000 kilometers of Earth, a distance closer than some satellites orbiting the planet. Despite the dramatic proximity, astronomers say there is no cause for alarm and instead describe the event as a unique 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 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 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.
