Asteroid 2013 GM3 will fly past Earth at 0.68 LD on April 14, 2026.

Asteroid 2013 GM3 will pass Earth at a minimum distance of 0.68 lunar distances (LD), equivalent to 0.00174 AU or approximately 260 500 km (161 900 miles), at 16:15 UTC on April 14, 2026. The relative velocity at the time of closest approach will be 7.41 km/s.

Based on its absolute magnitude (H) of 26.3, the estimated diameter of asteroid 2013 GM3 ranges from roughly 16 to 37 m (52 to 121 feet). This size estimate is typical for small near-Earth objects observed during close approaches within 1 lunar distance.

Asteroid 2013 GM3 belongs to the Aten orbital class. Its orbit has an eccentricity of 0.287 and a semi-major axis of 0.836 AU. The perihelion distance is 0.596 AU, and the inclination with respect to the ecliptic plane is 0.0176 degrees. These values indicate an orbit that is moderately eccentric and very close to the Earth’s orbital plane, consistent with typical Aten-class asteroids.

Further physical parameters, such as albedo, are not available. Asteroid 2013 GM3 is not classified as a potentially hazardous asteroid (PHA) according to current criteria.

2013 GM3 was first observed on April 1, 2013, and last observed on April 13, 2013, providing an observation arc of approximately 12 days. The current orbit solution has a condition code of 7, which suggests the trajectory is uncertain or preliminary and may be refined with additional data.

Several other near-Earth objects have recently passed within 1 lunar distance of Earth. Notably, asteroid 2026 FN5 passed at 0.99 LD (approximately 380 000 km / 236 100 miles) at 21:34 UTC on March 24, 2026, and asteroid 2026 FM3 at 0.62 LD (239 000 km / 148 500 miles) at 02:07 UTC on March 25, 2026. Other recent approaches include asteroid 2026 FS5 (0.12 LD), and asteroid 2026 FW2 (0.59 LD), as well as several smaller objects, all passing within close proximity in March 2026.