Asteroid 2021 SM1
2021 SM1 is a near-Earth asteroid roughly 31 m across, about the size of a house. Its closest recorded pass was on 16 Oct 1968 at 2.6 lunar distances.
Estimated size
31 m
about the size of a house
Closest pass on record
2.64 LD
16 Oct 1968
Speed relative to Earth
6.9 km/s
Brightness (H)
25.55
Lower means larger
Past close approaches
Recorded passes within about 20 lunar distances since 1900.