A recently detected asteroid will pass relatively close to Earth this Monday, attracting the interest of astronomers and space agencies worldwide. Even with the narrow cosmic distance, experts stress that the object poses no risk to the planet and will proceed safely along its trajectory through space.
Astronomers are closely monitoring an asteroid identified as 2026JH2, a rocky object that will pass near Earth at a distance of approximately 91,593 kilometers, or about 56,900 miles. According to calculations from the European Space Agency, the object will travel at roughly one quarter of the average distance between Earth and the moon, making it one of the closest asteroid flybys recorded this year. Even so, scientists insist there is no risk of collision or atmospheric impact.
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 projects that the asteroid is set to approach closest just before 6 p.m. Eastern Time, and although this may seem unnervingly near from a human viewpoint, astronomers emphasize that events like this occur fairly often across the vast expanse 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.
Binzel observes that car-sized or small-bus-sized asteroids routinely pass through Earth’s cosmic neighborhood, and explains that what sets the present apart is that improved detection systems now enable astronomers to spot many of these bodies that once 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 originates from the main asteroid belt located between Mars and Jupiter. Researchers explain that collisions among rocks within the belt, combined with the gravitational influence of Jupiter, can occasionally redirect fragments toward the inner solar system. This process has been understood for decades and is responsible for many 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 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, 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 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 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.
Tracking asteroids in the years ahead continues to be vital
Scientists are still certain that 2026JH2 poses no immediate threat, though specialists acknowledge that predicting an asteroid’s distant path is naturally challenging, since its orbit can gradually change over time due to gravitational forces from 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 observations, astronomers face greater challenges when evaluating the exact shape, rotation, and trajectory of nearby asteroids. Optical telescopes provide valuable information, but radar systems allow scientists to build far more precise models of an object’s movement and structure.
Margot explained that only a small fraction of near-Earth asteroids similar in size to 2026JH2 have been identified so far. Because many of these objects are relatively dark and small, they are often discovered only days before their closest approaches, once they become bright enough for survey telescopes to detect.
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 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 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 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 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.
