Asteroid 2021 SY3
2021 SY3 is a near-Earth asteroid roughly 16 m across, about the size of a house. Its closest recorded pass was on 28 Sept 1902 at 4.3 lunar distances.
Estimated size
16 m
about the size of a house
Closest pass on record
4.30 LD
28 Sept 1902
Speed relative to Earth
6.9 km/s
Brightness (H)
27
Lower means larger
Past close approaches
Recorded passes within about 20 lunar distances since 1900.