Asteroid 2021 ER
2021 ER is a near-Earth asteroid roughly 16 m across, about the size of a house. Its closest recorded pass was on 3 Mar 1920 at 0.9 lunar distances.
Estimated size
16 m
about the size of a house
Closest pass on record
0.93 LD
3 Mar 1920
Speed relative to Earth
4.5 km/s
Brightness (H)
27.01
Lower means larger
Past close approaches
Recorded passes within about 20 lunar distances since 1900.