These objects are tracked and are NOT on a collision course with Earth. “If it hits” is a hypothetical to show scale.
Near-Earth object · discovered 2020-12-09
2020 XC3 (2020 XC3)
48
watch score
How bigiEstimated from brightness and an assumed albedo. Radar or a spacecraft visit would tighten it.
110m
range 82–184 m
How closeiLD = lunar distance (~384,400 km). The closest the object's path brings it to Earth's centre.
14.5LD
range ≈5,557,218 km
How fastiVelocity relative to Earth at closest approach.
14.3km/s
CompositioniInferred from spectral type. Drives whether an impact would airburst or reach the ground.
Stony
range Stony (assumed)
If it hit — a scale comparison, not a forecast
How big is that, really?
Bus12 m
20-storey tower65 m
This object110 m
Stadium250 m
Eiffel Tower330 m
Impact energyiKinetic energy converted to TNT-equivalent, with the size and speed ranges propagated through.
82 Mt
range 34 Mt – 386 Mt
Where that sits
Hiroshima
Chelyabinsk
Tunguska
Tsar Bomba
An object this size would reach the ground and excavate a crater. The figures below are a scale comparison — (2020 XC3) is not on an impact trajectory.