Near-Earth Asteroid Tracker

Live close approach data from NASA · Updated hourly

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Asteroid: 423100 (2004 BX1)

Notable 2026-Oct-20 03:11 UTC

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

Historical context

This object passes within 171.47 LD of Earth. Approaches this close (within 172 LD) are recorded several times per month across all tracked near-Earth objects.

Size comparison

Estimated diameter: 543–1214m — the width of a small town.

If it were to strike Earth (it won't), the estimated impact energy would be approximately 121,497 megatons of TNT.

Closest distance
171.47 LD
65.9 million km
Relative velocity
37.87 km/s
136,322 km/h
Diameter estimate
~878m
543–1214m range
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