Asteroid 2021 EM4
2021 EM4 is a near-Earth asteroid roughly 15 m across, about the size of a house. Its closest recorded pass was on 20 Mar 1909 at 4.4 lunar distances.
Estimated size
15 m
about the size of a house
Closest pass on record
4.39 LD
20 Mar 1909
Speed relative to Earth
6.4 km/s
Brightness (H)
27.14
Lower means larger
Past close approaches
Recorded passes within about 20 lunar distances since 1900.