Calcolatore Energia Impatto Asteroide
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Impact Energy
314,159,265,358,979,260.000 J
Impact Energy vs Asteroid Diameter
Formula
## Asteroid Impact Energy The kinetic energy of a spherical impactor: **KE = 0.5 × m × v²** where **m = (π/6) × d³ × ρ** (sphere mass) - d = diameter - ρ = density (rock: ~3000, iron: ~7800 kg/m³) - v = impact velocity (typical 15-25 km/s for near-Earth asteroids) 1 megaton TNT = 4.184 × 10¹⁵ J. The Chicxulub impactor (~10 km) released ~10¹⁴ Mt.
Esempio Risolto
A 100 m rocky asteroid at 20 km/s.
- 01Mass = (π/6) × 100³ × 3000 = 1.571e9 kg
- 02KE = 0.5 × 1.571e9 × (20000)²
- 03= 0.5 × 1.571e9 × 4e8 = 3.14e17 J
- 04≈ 75 megatons TNT (larger than any nuclear weapon tested)
Domande Frequenti
How big must an asteroid be to cause global damage?
Roughly 1 km or larger. The Chicxulub impactor (~10 km) caused a mass extinction. A 100 m asteroid would devastate a city or region.
What is a typical impact velocity?
For near-Earth asteroids: 15-25 km/s. Long-period comets can hit at 40-70 km/s, greatly increasing energy.
How often do large impacts happen?
Tunguska-class events (~50 m): every few hundred years. Chicxulub-class (~10 km): every ~100 million years.