On March 21, the largest asteroid predicted to pass by Earth in 2021 will be at its closest. It is called 2001 FO32.
Try this PYQ:
Q.Which of the following is/are cited by the scientists as evidence/evidence for the continued expansion of the universe?
- Detection of microwaves in space
- Observation of redshirt phenomenon in space
- Movement of asteroids in space
- Occurrence of supernova explosions in space
Codes:
(a) 1 and 2 only
(b) 2 only
(c) 1, 3 and 4
(d) None of the above can be cited as evidence.
2001 FO32
- There is no threat of a collision with our planet now or for centuries to come.
- Scientists know its orbital path around the Sun very accurately since it was discovered 20 years ago and has been tracked ever since.
- It won’t come closer than 2 million km to Earth, but it will present a valuable scientific opportunity for astronomers who can get a good look at a rocky relic that formed at the dawn of our Solar System.
Proximity to Earth
- For comparison, when it is at its closest, the distance of 2 million km is equal to 5¼ times the distance from Earth to the Moon.
- Still, that distance is close in astronomical terms, which is why 2001 FO32 has been designated a “potentially hazardous asteroid”.
- The reason for the asteroid’s unusually speedy close approach is its highly eccentric orbit around the Sun, an orbit that is tilted 39° to Earth’s orbital plane.
- This orbit takes the asteroid closer to the Sun than Mercury, and twice as far from the Sun as Mars.
- Later, the asteroid slows after being flung back out into deep space and swinging back toward the Sun. It completes one orbit every 810 days (about 2¼ years).
Studying the visitor
- This asteroid will provide an opportunity for astronomers to get a more precise understanding of the asteroid’s size and albedo (i.e. how bright, or reflective, its surface is), and a rough idea of its composition.
- When sunlight hits an asteroid’s surface, minerals in the rock absorb some wavelengths while reflecting others.
- By studying the spectrum of light reflecting off the surface, astronomers can measure the chemical “fingerprints” of the minerals on the surface of the asteroid.
