Earth has acquired a temporary companion in space, but it won’t stay around for long. A small space rock called 2026 QQ8 was pulled by Earth’s gravity in April 2026, went unnoticed for months, and was first detected in August. Now confirmed as a natural object, the roughly 1 to 2 meter wide asteroid is expected to remain temporarily attached to our planet until December before escaping and continuing its journey around the Sun in 2027. The discovery was reported by the International Astronomical Union’s Minor Planet Center on October 29, after astronomers had gathered enough observations to establish the identity and trajectory of the object. Hungarian astronomer Krisztián Sárneczky first observed it on August 19-20, according to reports from Space.com. Initially, however, scientists were unsure whether the faint object was a natural space rock or artificial remains of an old rocket or satellite. Follow-up observations helped resolve that uncertainty. Astronomers used the University of Hawaii’s 2.2-meter telescope and the Lowell Discovery Telescope to study the object. Additional measurements, including its response to solar radiation pressure, helped rule out an artificial origin. The Minor Planet Center later classified it as a natural object, probably a small asteroid, and described it as a temporarily captured object. How Earth Captured Its New Minimoon The object did not begin orbiting Earth because it was launched toward the planet or deliberately placed there. Instead, it passed close enough for Earth’s gravity to temporarily alter its trajectory. Orbital calculations indicate that 2026 QQ8 entered Earth’s gravitational sphere of influence in late April. This region is often described using the concept of Hill’s sphere, the area around a planet where its gravitational pull can dominate the motion of a smaller object passing against the influence of the Sun. When an asteroid passes through this region under the right conditions, it can become temporarily captured. It can then travel around the planet before escaping and returning to an independent orbit around the Sun. However, unlike Earth’s permanent Moon, a minimoon does not necessarily follow a stable circular path. Their trajectory may be irregular and their stay may last only weeks or months. In the case of 2026 QQ8, astronomers expect the temporary capture to last approximately eight to nine months. The asteroid is also not particularly close to Earth by lunar standards. Its closest expected distance during this temporary stay is about 568,000 kilometers, about one and a half times the average distance between the Earth and the Moon. Therefore, it is not expected to pose an impact threat. A visitor returning to Earth’s vicinity Although 2026 QQ8 has only recently been recognized as a minimoon, its trajectory suggests that it has approached Earth before. According to orbital analysis reported by EarthSky, the object comes relatively close to our planet about once every decade. It passed close to Earth in 1965, but not close enough to be captured by its gravity. Its next approach scheduled for 2058 is also not expected to result in another temporary capture. Scientists have calculated that 2026 QQ8 takes approximately 359 days to complete one orbit around the Sun, slightly less than an Earth year. Therefore, its current temporary stay represents an interruption of its usual journey around the star, rather than the beginning of a permanent relationship with our planet. The object is expected to remain under Earth’s gravitational influence until December. It should then separate, probably towards the end of the year or early January 2027, and continue along its own solar orbit. Earth may have more than one temporary moon 2026 QQ8 is not the first small object to become a temporary satellite of Earth. Astronomers have previously identified objects such as 2020 CD3 and 2024 PT5, which spent limited periods in Earth’s gravitational neighborhood before drifting away. A 2025 study published in the journal Icarus suggested that Earth could have an average of around six minimoons of lunar origin at any given time. These objects may be fragments broken off from the Moon when asteroids collide with its surface. The researchers estimated that these temporary companions could typically remain around Earth for about nine months, although the prediction carries considerable uncertainty. Research presented at the Europlanet Science Congress in 2026 also suggested that the largest minimoon around Earth at any given time may typically be only about 75 centimeters in diameter. A space rock measuring about three meters could remain captured for 10 to 20 years under suitable conditions. Finding these objects is difficult because they are small, faint, and often move quickly across the sky. Their short stays also make them challenging targets for astronomers. Improved telescope surveys and follow-up observations are helping scientists identify more of these temporary visitors. The distinction between a minimoon and a nearmoon is also important. A minimoon is actually held temporarily by the gravity of a planet. A quasi-moon, on the other hand, travels around the Sun in an orbit that makes it appear to accompany the Earth, but it is not gravitationally bound to our planet. For now, 2026 QQ8 is a fleeting addition to Earth’s neighborhood. It’s too small and distant to be a spectacular sight in the night sky, but its capture offers astronomers another opportunity to study the small objects moving through the region around our planet. By early 2027, the little visitor is expected to have broken free of Earth’s gravitational grip and resumed its journey around the Sun.
