Near-Earth Asteroid Tracker

Live close approach data from NASA · Updated hourly

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Asteroid: (2017 GK4)

Potentially hazardous 2026-Sep-28 00:38 UTC

Potentially hazardous by NASA classification — Classified hazardous by NASA due to its size — passing safely. No known asteroid poses an impact risk in the next 100+ years.

Historical context

This object passes within 47.91 LD of Earth. Approaches this close (within 48 LD) are recorded several times per month across all tracked near-Earth objects.

Size comparison

Estimated diameter: 117–261m — about the size of a city block.

If it were to strike Earth (it won't), the estimated impact energy would be approximately 124 megatons of TNT.

Closest distance
47.91 LD
18.4 million km
Relative velocity
12.17 km/s
43,803 km/h
Diameter estimate
~189m
117–261m range
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