Asteroid 2025 US6 will fly past Earth at 0.39 LD on October 28, 2025

Asteroid 2025 US6 will fly past Earth at a minimum distance of 0.39 lunar distances (LD) / 0.00101 astronomical units (AU), equivalent to 151 070 km (93 889 miles) from the center of Earth, at 02:33 UTC on October 28, 2025. The flyby will occur at a relative velocity of 1.95 km/s.

Based on its absolute magnitude (H) of 31.008, asteroid 2025 US6 is estimated to be between 2 and 5 m (6.6–16.4 feet) in diameter. This size places it among the smaller near-Earth objects routinely detected.

Asteroid 2025 US6 is classified in the Aten orbital group. Its orbit is characterized by a low eccentricity (e = 0.0265), a semi-major axis of 0.961 AU, a perihelion distance of 0.935 AU, and a low inclination of 0.0287 degrees. These parameters indicate a nearly circular and minimally inclined orbit relative to the ecliptic plane.

No direct measurements of albedo are available; thus, the surface composition is uncertain. The object is not classified as potentially hazardous (PHA) according to current criteria.

Asteroid 2025 US6 was first observed on October 26, 2025, and last observed on the same date, indicating an observation arc of 1 day. The orbit solution carries a condition code of 6, suggesting the current trajectory is still uncertain or preliminary and may be refined with additional data.

A number of other asteroids have also passed within 1 lunar distance of Earth in recent months. Asteroid 2025 UG6 approached at 0.36 LD (55 400 km / 34 425 miles) on October 23, 2025. Asteroid 2025 UJ4 passed at 0.16 LD (23 910 km / 14 860 miles) on October 21, 2025. Additionally, asteroid 2025 UM1 made a very close approach at 0.28 LD (42 000 km / 26 098 miles) on October 18, 2025. All of these events were recorded with precise timing in UTC.