Asteroid 2021 AD4
2021 AD4 is a near-Earth asteroid roughly 29 m across, about the size of a house. Its closest recorded pass was on 8 Jan 1932 at 1.2 lunar distances.
Estimated size
29 m
about the size of a house
Closest pass on record
1.21 LD
8 Jan 1932
Speed relative to Earth
5.3 km/s
Brightness (H)
25.66
Lower means larger
Past close approaches
Recorded passes within about 20 lunar distances since 1900.