2000 SG344
Asteroid
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2000 SG₃₄₄ is a small Aten asteroid first observed in 2000. It is assumed to have a diameter of approximately 37 meters – or roughly twice that of the Chelyabinsk meteor – and an assumed mass of 7.1×10⁷ kg, but the size is only known within about... Wikipedia
Orbital period: 353 days
Discovered: September 29, 2000
Asteroid group: Aten asteroid
Discoverer: David J. Tholen
Mass: 7.1×107 kg (assumed)
Earth MOID: 0.0008 AU (120,000 km)
Observation arc: 507 days (1.39 yr)