Asteroid 1979 XB
1979 XB is on NASA's Sentry list of objects that cannot yet be fully ruled out as future impactors.
Estimated size
660 m
about the size of a small town
Closest pass on record
—
Speed relative to Earth
23.8 km/s
Brightness (H)
18.54
Lower means larger
Past close approaches
Recorded passes within about 20 lunar distances since 1900.
No past close approaches in our records.