Asteroid 2025 TN5 flew past Earth at 0.36 LD on October 10, 2025

Asteroid 2025 TN5 flew past Earth at a distance of 0.36 lunar distances (LD) / 0.00091 astronomical units (AU), equivalent to approximately 136 600 km (84 921 miles), at 04:18 UTC on October 10, 2025. The object’s relative velocity during the close approach was 16.82 km/s.

Based on its absolute magnitude (H) of 27.918, the estimated diameter of 2025 TN5 is between 8 m and 19 m (26 and 62 feet).

2025 TN5 is classified as an Apollo-type near-Earth object. Its orbit is notably eccentric (e = 0.641), with a semi-major axis of 2.16 AU, a perihelion distance of 0.775 AU, and an inclination of 6.37 degrees. This places its orbit within the typical range for Apollo asteroids, which have Earth-crossing trajectories and moderate inclinations.

The asteroid is not listed as potentially hazardous. Its absolute magnitude indicates a small size, and no high reflectivity (albedo) data are currently available, so further classification of its surface type is not possible.

2025 TN5 was first observed on October 12, 2025, and last observed on October 14, 2025, resulting in a 2-day observational window. The orbit has a condition code of 8, suggesting the current solution is uncertain or preliminary and may be refined with additional observations.

Several other asteroids recently approached within 1 lunar distance of Earth. Notably, asteroid 2025 TP5 passed at 0.25 LD (approx. 95 900 km / 59 592 miles) at 20:08 UTC on October 15, 2025. Asteroid 2025 TC made its closest approach at 0.22 LD (approx. 84 400 km / 52 453 miles) at 06:34 UTC on October 3, 2025. Additionally, asteroid 2025 TQ2 passed even closer, at just 0.03 LD (approx. 11 500 km / 7 146 miles), at 19:02 UTC on October 2, 2025.