Asteroid 390725 2003 HB
390725 2003 HB is a near-Earth asteroid roughly 293 m across, about the size of a stadium. Its closest recorded pass was on 25 May 1978 at 18.9 lunar distances.
Estimated size
293 m
about the size of a stadium
Closest pass on record
18.85 LD
25 May 1978
Speed relative to Earth
14.0 km/s
Brightness (H)
19.69
Lower means larger
Past close approaches
Recorded passes within about 20 lunar distances since 1900.