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.
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.
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 point, 2026JH2 will still remain significantly farther away than the altitude used by many geosynchronous satellites that support telecommunications, weather forecasting, and broadcasting systems. Scientists stress that the object’s trajectory has been thoroughly analyzed and does not intersect with Earth.
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.
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
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, explained that an asteroid’s brightness is not a reliable measure of its size, as a large yet low‑albedo object may appear faint, whereas a smaller, highly reflective one can seem much more luminous.
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 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 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 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 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.
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.
Apophis expected to provide a historic sky event
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 anticipated Apophis flyby is positioned to become one of the most closely monitored asteroid encounters of modern times, and unlike 2026JH2, which will remain out of sight to the naked eye, Apophis is expected to be visible without telescopes from several regions across Europe, Africa, and the Middle East.
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.
