Asteroid 2021 SO
2021 SO is a near-Earth asteroid roughly 34 m across, about the size of a house. Its closest recorded pass was on 13 Oct 1957 at 4.1 lunar distances.
Estimated size
34 m
about the size of a house
Closest pass on record
4.08 LD
13 Oct 1957
Speed relative to Earth
6.6 km/s
Brightness (H)
25.35
Lower means larger
Past close approaches
Recorded passes within about 20 lunar distances since 1900.