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Asteroid 2018VP1 

Asteroid 2018VP1 

Context:

According to NASA, an asteroid (2018VP1) that is on a collision course with Earth could come very close to the planet.

About 2018VP1:

  • The asteroid, dubbed 2018VP, was first discovered at the Palomar Observatory in 2018 in San Diego.
  • Asteroid 2018VP1 is very small, approx. 6.5 feet, and poses no threat to Earth.
  • It currently has a 0.41% chance of entering our planet’s atmosphere, but if it did, it would disintegrate due to its extremely small size.
  • A 13-day observational arc followed, after which the asteroid was not detected again.
  • When it was discovered, the asteroid was around 2,80,000 miles away from the Earth.
  • This year, however, the asteroid could be as close as 4,700 miles according to NASA’s close approach database.

Concerns:

  • As per NASA, there is a 0.41 % chance that 2018VP1 would impact the Earth. Even if the asteroid does enter our planet’s atmosphere, it is unlikely to cause any harm on November 2.
  • There are around 1 billion asteroids having a diameter greater than 1 metre. Objects that can cause significant damage upon impact are larger than 30 metres.
  • The Chicxulub impactor, the celestial object that caused the sudden extinction of most dinosaur species 66 million years ago, had a diameter of over 10 kilometres.
  • 2018VP1 has a diameter of all but 2 metres, around the size of a small automobile, and would likely burn up into after entering the Earth’s atmosphere before reaching the ground. According to NASA, such an event happens about once every year.
  • As per NASA’s Near-Earth Object Observations Programme, asteroids that are 140 metres or larger (bigger than a small football stadium) are of “the greatest concern” due to the level of devastation their impact is capable of causing.
    • However, it has been pointed out that no asteroid larger than 140 metres has a “significant” chance of hitting the Earth for the next 100 years.

Ways to deflect asteroids:

  • Scientists have already suggested different ways to ward off threats from the asteroid before it reaches Earth, or deflecting it off its Earth-bound course by hitting it with a spacecraft.
  • The most drastic measure undertaken so far is the Asteroid Impact and Deflection Assessment (AIDA) includes NASA’s Double Asteroid Redirection Test (DART) mission and the European Space Agency’s (ESA) Hera.
    • Hera: It is scheduled to launch in 2024. It will arrive at the Didymos system in 2027 to measure the impact crater produced by the DART collision and study the change in the asteroid’s orbital trajectory.
  • The mission’s target is Didymos, a binary near-Earth asteroid, one of whose bodies is of the size that could pose the most likely significant threat to Earth.
  • In 2018, NASA announced it had started the construction of DART, which is scheduled to launch in 2021 with an aim to slam into the smaller asteroid of the Didymos system at around 6 km per second in 2022.

Source: Indian Express