Asteroid 2003 BB21
2003 BB21 is a near-Earth asteroid roughly 245 m across, about the size of a stadium. Its closest recorded pass was on 19 Mar 1906 at 10.8 lunar distances.
Estimated size
245 m
about the size of a stadium
Closest pass on record
10.85 LD
19 Mar 1906
Speed relative to Earth
8.5 km/s
Brightness (H)
21.05
Lower means larger
Past close approaches
Recorded passes within about 20 lunar distances since 1900.