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Asteroid passing close to the Earth
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Old 26-01-2023, 19:00   #1
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Asteroid passing close to the Earth

Asteroid 2023 BU will pass closer to the earth than some satellites.

It will pass over the southern tip of South America just after midnight GMT.

https://www.bbc.co.uk/news/science-environment-64411469
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Old 26-01-2023, 19:13   #2
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Re: Asteroid passing close to the Earth

A pity in a way that it isn’t going to hit - a rock that size would make a spectacular fireball but not pose any significant threat to anyone on the ground.
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Old 30-01-2023, 05:12   #3
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Yea it would be interesting if it splashed down in the ocean somewhere.....
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Old 01-02-2023, 21:36   #4
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Re: Asteroid passing close to the Earth

Central Russia !
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Old 01-02-2023, 22:55   #5
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Re: Asteroid passing close to the Earth

Is this the green comet we can see tonight, or something else?
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Old 02-02-2023, 01:33   #6
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Re: Asteroid passing close to the Earth

It was something else, it flew past and was gone on the night of the 26th.
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Old 24-03-2023, 19:56   #7
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Re: Asteroid passing close to the Earth

Another one this weekend.

Quote:
An asteroid large enough to destroy a city will pass between the orbits of the Earth and the Moon this weekend
https://www.bbc.co.uk/news/science-environment-65061818
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Old 24-03-2023, 20:12   #8
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Re: Asteroid passing close to the Earth

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Isn't that crazy close?
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Old 25-03-2023, 01:41   #9
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Re: Asteroid passing close to the Earth

Yep, just under 110,000 miles is pretty close.
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Old 25-03-2023, 06:11   #10
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Re: Asteroid passing close to the Earth

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Isn't that crazy close?
Crazy that they only noticed it a year ago, it'll be back near missing again next year to
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Old 25-03-2023, 10:38   #11
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Re: Asteroid passing close to the Earth

In galactic terms it’s less than a hair’s breadth. It’s worth remembering though that on a planetary scale, the chances of a city-killing meteorite actually landing close to a major population centre are pretty low. Most of the surface is water and most of the land is uninhabited.
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Old 25-03-2023, 14:12   #12
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Re: Asteroid passing close to the Earth

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Originally Posted by Chris View Post
Most of the surface is water and most of the land is uninhabited.
Unfortunately, the water part is still a bit of an issue, as any hitting an ocean would cause a tsunami.
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Old 26-03-2023, 21:25   #13
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Re: Asteroid passing close to the Earth

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Originally Posted by Chris View Post
In galactic terms it’s less than a hair’s breadth. It’s worth remembering though that on a planetary scale, the chances of a city-killing meteorite actually landing close to a major population centre are pretty low. Most of the surface is water and most of the land is uninhabited.
Tell that to the dinosaurs.
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Old 26-03-2023, 21:35   #14
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Re: Asteroid passing close to the Earth

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Tell that to the dinosaurs.
That was an extinction event rather than a mere city-killer … their space rock was likely 50 or 60 times bigger than this one.
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Old 29-03-2023, 23:15   #15
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Re: Asteroid passing close to the Earth

It's not the size that matters as much as the velocity of impact. KE = 1/2 mass times the square of the velocity. Any rock hitting us is bad news.

(Incidentally, that's why, in some areas, the speed limit was lowered from 40mph to 30. Reason: square 30, you get 900...but square 40 and you get 1600, i.e. nearly double the kinetic energy. This is why impacts at 30 are so much more survivable...and why motorways are so dangerous if things go wrong.)

We definitely need Spaceguard to spot these wayward rocks sooner. Come back, Clarke, all is forgiven.
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