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 2015-05-21
2015 LM24 (2015 LM24)
40
watch score
How bigiEstimated from brightness and an assumed albedo. Radar or a spacecraft visit would tighten it.
71m
range 53–119 m
How closeiLD = lunar distance (~384,400 km). The closest the object's path brings it to Earth's centre.
18.1LD
range ≈6,951,975 km
How fastiVelocity relative to Earth at closest approach.
13.7482227784676km/s
range 13.7482227784676–13.7482227784676 km/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 object71 m
Stadium250 m
Eiffel Tower330 m
Impact energyiKinetic energy converted to TNT-equivalent, with the size and speed ranges propagated through.
21 Mt
range 8.8 Mt – 99 Mt
Where that sits
Hiroshima
Chelyabinsk
Tunguska
Tsar Bomba
At this size and speed it would most likely airburst high in the atmosphere — energy between Tunguska 1908 (~12 Mt) and Tsar Bomba (~50 Mt), shown as a bracket, not a single number.