Five Asteroids Flew Past Earth Yesterday, 2 Bigger Than the Eiffel Tower

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According to the Center for Near-Earth Object Studies (CNEOS), five asteroids flew past our planet on 6th January 2021. The names of the five asteroids are 2021 AC, 2016 CO247, 2021 AJ, 2018 KP1, 332446 (2008 AF4).

Out of the five, three are relatively small, but the other two are bigger than the Eiffel Tower.

The five asteroids

The biggest of all, named 2008 AF4 is nearly half a kilometre wide, with an average diameter of 495 meters. Travelling at a speed of 39,564 kilometres per hour, it made a close approach to Earth at 21:52 hours GMT. If this asteroid were to collide with our planet, the resulting impact would be equal to 25 megatons to 50 megatons, which is the same as the largest nuclear bombs which exist today.

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The second biggest asteroid, 2016 CO247 has an average diameter of 340 meters. It is travelling at a speed of 60,228 kilometres per hour and made a close approach to our planet at 04:09 GMT.

Five asteroids will fly past the Earth on 6th January 2021. Out of the five, two are as big as the Eiffel Tower.

Asteroid 2021 AC has an average diameter of 73.5 meters. It is travelling at a speed of 50,652 kilometres per hour and flew past Earth at 03:27 GMT.

Asteroid 2018 KP1 is travelling at a speed of 15,948 kilometres per hour. With an average diameter of 41 meters, it made a close call with our planet at 13:21 GMT.

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The smallest asteroid 2021 AJ, with an average diameter of 19.5 meters, is flying at a speed of 45,648 kilometres per hour. It approached Earth at 11:38 GMT.

The smallest asteroid is traveling at a speed enough to release as much energy as the Hiroshima bomb blast, if it were to collide with the Earth.

Even though the size is crucial while estimating whether the asteroids pose a risk, its speed can significantly alter this level of risk. An asteroid with a size as big as a house, and travelling at a speed of 48,000 kilometres per hour is enough to release as much energy as the Hiroshima bomb blast if it were to collide with our planet.

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Hence, even though asteroid 2021 AJ is the smallest in size of them all, it is still fast enough to wipe out an entire city if its course changes.

But you can take a sigh of relief as none of these asteroids pose a risk to us. The National Aeronautics and Space Administration (NASA) has said that these asteroids are not an immediate threat. The reason these are tracked is because they are either closer to Earth than 7.5 million kilometres (19.5 times the distance between the Moon and the Earth) or they are bigger than 150 meters.

Other asteroids

Other asteroids are also set to visit the vicinity of our planet. Asteroid 2021 AT will fly past the Earth today (7th January). Its estimated diameter is 14 to 32 metres. The next close call between Earth and an asteroid will be on 9th January, when asteroid 2015 NU13 will fly past Earth.

On 11th January, two asteroids named 2020 RO6 and 2013 YS2 will zoom past our planet as well.

Further Reading:

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Jhanvi Kotak
Jhanvi is an introvert nerd. who sometimes claims she can be extrovert too. An economics student, book reader and foody sums her up pretty well.


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