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 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.
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 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.
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.
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 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 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
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 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 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 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.
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 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 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 give researchers crucial chances to examine asteroid composition, motion, and internal properties while further advancing planetary defense measures, and every nearby passage deepens scientific insight into how such bodies act and how humanity might react should an asteroid one day present a real danger.
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 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.
