Why in the News?
Asteroid YR4, discovered in December 2024 via Chile’s ATLAS telescope, was first thought to threaten Earth but was later ruled out. Scientists now focus on its potential Moon impact in 2032.
About Asteroid 2024 YR4:
- Asteroid 2024 YR4 was discovered in December 2024 by the ATLAS telescope located in Chile.
- It is a near-Earth asteroid (NEA) whose orbit brings it within 1.3 AU (Earth-Sun distances) of Earth.
- It is estimated to be 65 metres wide, roughly the size of a 10-storey building.
- Initially, it was suspected to have a 3.1% chance of impacting Earth in 2032, triggering NASA’s highest-ever asteroid impact alert.
- Subsequent tracking ruled out an Earth impact but indicated a 3.8% chance of hitting the Moon on December 22, 2032.
- A Moon impact would create a 500 to 2,000-metre-wide crater and release energy 340 times more powerful than the Hiroshima bomb.
- Despite being smaller than the 140m threshold for “potentially hazardous asteroids,” its unusual trajectory drew global scientific attention.
- Scientists continue to observe YR4, including during a close approach in 2028, to refine its orbital predictions.
Back2Basics: ATLAS Telescope
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| [UPSC 2011] Comets show a perceptible glowing tail, while asteroids do not. Which of the statements given above is/are correct?
Options: (a) 1 and 2 only (b) 1 and 3 only* (c) 3 only (d) 1, 2 and 3 |
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