Asteroid 471240 2011 BT15
471240 2011 BT15 is a near-Earth asteroid roughly 182 m across, about the size of a stadium. Its closest recorded pass was on 3 Jan 1983 at 4.0 lunar distances.
Estimated size
182 m
about the size of a stadium
Closest pass on record
4.03 LD
3 Jan 1983
Speed relative to Earth
8.4 km/s
Brightness (H)
21.7
Lower means larger
Past close approaches
Recorded passes within about 20 lunar distances since 1900.