Asteroid 2017 OA
2017 OA is a near-Earth asteroid roughly 345 m across, about the size of a stadium. Its closest recorded pass was on 8 Dec 1978 at 17.7 lunar distances.
Estimated size
345 m
about the size of a stadium
Closest pass on record
17.74 LD
8 Dec 1978
Speed relative to Earth
13.7 km/s
Brightness (H)
20.31
Lower means larger
Past close approaches
Recorded passes within about 20 lunar distances since 1900.