小行星撞击能量计算器
使用此小行星撞击能量计算器快速获得准确的计算结果。
m
kg/m³
m/s
Impact Energy
314,159,265,358,979,260.000 J
Asteroid Mass1,570,796,327 kg
Energy (megatons TNT)75.09 Mt
Impact Energy vs Asteroid Diameter
公式
Asteroid Impact Energy
The kinetic energy of a spherical impactor:
KE = 0.5 × m × v²
where m = (π/6) × d³ × ρ (sphere mass)
1 megaton TNT = 4.184 × 10¹⁵ J. The Chicxulub impactor (~10 km) released ~10¹⁴ Mt.
计算示例
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)
常见问题
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.