Near-Earth Asteroid Tracker

Live close approach data from NASA · Updated hourly

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Asteroid: 276891 (2004 RH340)

Notable 2026-Oct-02 10:15 UTC

Notable approach — Unusually close or large, but poses no risk.

Historical context

This object passes within 141.19 LD of Earth. Approaches this close (within 142 LD) are recorded several times per month across all tracked near-Earth objects.

Size comparison

Estimated diameter: 330–738m — about the size of a large sports stadium.

If it were to strike Earth (it won't), the estimated impact energy would be approximately 5,717 megatons of TNT.

Closest distance
141.19 LD
54.3 million km
Relative velocity
17.32 km/s
62,355 km/h
Diameter estimate
~534m
330–738m range
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