DARTs final look at the asteroid moonlet Dimorphos before impact. The spacecraft’s on board DRACO imager took this final image ~4 miles (~6 kilometers) from the asteroid and only 1 second before impact. DART’s impact occurred during transmission of the image to Earth, resulting in a partial picture.

Earths radius is 6,400km. A sphere with twice the surface area has a radius of 9,000km. So, approximately once per year, a four-metre asteroid will come within 2,600km of the surface of Earth – the difference between 9,000km and 6,400km. Double the surface area again and you could expect two per year within 6,400km of Earth's surface,

OnFebruary 15, 2013, an asteroid slammed into Earth's atmosphere at nearly 70,000 kilometers per hour. Almost the size of a tennis court, it blazed brilliantly in 65million years ago an asteroid roughly 10 to 15 kilometers (6 to 9 miles) in diameter hit Earth in what is now Mexico. The impact killed 70% of all species on Earth, including the
TheYounger Dryas impact hypothesis (YDIH) or Clovis comet hypothesis is a speculative attempt to explain the onset of the Younger Dryas (YD) cooling at the end of the Last Glacial Period, around 12,900 years ago.The hypothesis is controversial and not widely accepted by relevant experts. It is an alternative to the long-standing and widely accepted explanation
Theminimum impact velocity on Earth is 11 km/s. Typical impact velocities are 17 km/s for asteroids and 51 km/s for comets. The maximum Earth impact velocity for objects orbiting the sun is 72 km/s. Impact Angle (in degrees) The impact angle is measured from a plane tangent to the impact surface. This angle is 90 degrees for a vertical impact. 6zqdFim.
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    • asteroid impacts on earth map