Asteroid 2021 BB
2021 BB is a near-Earth asteroid roughly 10 m across, about the size of a bus. Its closest recorded pass was on 16 Jan 1975 at 4.4 lunar distances.
Estimated size
10 m
about the size of a bus
Closest pass on record
4.42 LD
16 Jan 1975
Speed relative to Earth
5.9 km/s
Brightness (H)
28.02
Lower means larger
Past close approaches
Recorded passes within about 20 lunar distances since 1900.