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2021 SM3, an asteroid the height of the Golden Gate Bridge will fly by on Oct 20th, one of several passing by this fall

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  • 2021 SM3, an asteroid the height of the Golden Gate Bridge will fly by on Oct 20th, one of several passing by this fall

    https://www.jpost.com/science/multip...s-earth-681631
    Multiple asteroids larger than pyramids head towards Earth

    Each asteroid listed is estimated to exceed 140 meters in diameter, the minimum size needed to be considered a Potentially Hazardous Object. The largest of these could be as tall as 380 meters.

    By AARON REICH OCTOBER 11, 2021 12:31
    ....
    But 2021 SM3 will be followed up just five days later by an even larger asteroid heading for Earth. Dubbed 1996 VB3, this asteroid's size ranges between 100 meters to a whopping 230 meters, taller than the height of San Francisco's iconic Golden Gate Bridge, and is set to fly past the Earth on October 20. This asteroid is set to pass even closer to the planet, around 3.2 million kilometers away, though it is still not predicted to impact the planet.

    ...
    Luckily, NASA has estimated that the Earth is at no risk of being impacted by an asteroid within the next 100 years, though this notably only applies to asteroids coming from the "front," meaning towards Earth and the Sun. Asteroids coming from the "back," towards Earth away from the Sun, are still notoriously difficult to detect. On September 16, asteroid 2021 SG, ranging between 42 meters and 94 meters in size, flew past the Earth, and scientists never even knew it existed, let alone flying past the planet, until the next day.
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