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 2025-08-27
2025 QM9 (2025 QM9)
36
watch score
How bigiEstimated from brightness and an assumed albedo. Radar or a spacecraft visit would tighten it.
20m
range 15–33 m
How closeiLD = lunar distance (~384,400 km). The closest the object's path brings it to Earth's centre.
15.2LD
range ≈5,827,633 km
How fastiVelocity relative to Earth at closest approach.
11.1km/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
This object20 m
20-storey tower65 m
Stadium250 m
Eiffel Tower330 m
Impact energyiKinetic energy converted to TNT-equivalent, with the size and speed ranges propagated through.
373 kt
range 158 kt – 1.7 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 Hiroshima (Little Boy) (~0.015 Mt) and Chelyabinsk 2013 (~0.45 Mt), shown as a bracket, not a single number.