Asteroid 2012 HD20
2012 HD20 is a near-Earth asteroid roughly 144 m across, about the size of a stadium. Its closest recorded pass was on 17 Nov 1961 at 17.4 lunar distances.
Estimated size
144 m
about the size of a stadium
Closest pass on record
17.43 LD
17 Nov 1961
Speed relative to Earth
7.3 km/s
Brightness (H)
22.2
Lower means larger
Past close approaches
Recorded passes within about 20 lunar distances since 1900.