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Cattledog

(5,910 posts)
Fri Jul 26, 2019, 01:38 PM Jul 2019

'It snuck up on us': Scientists stunned by 'city-killer' asteroid that just missed Earth.

By Allyson Chiu
July 26 at 10:46 AM

Alan Duffy was confused. On Thursday, the astronomer’s phone was suddenly flooded with calls from reporters wanting to know about a large asteroid that had just whizzed past Earth, and he couldn’t figure out “why everyone was so alarmed.”

“I thought everyone was getting worried about something we knew was coming,” Duffy, who is lead scientist at the Royal Institution of Australia, told The Washington Post. Forecasts had already predicted that a couple of asteroids would be passing relatively close to Earth this week.

Then, he looked up the details of the hunk of space rock named Asteroid 2019 OK.

“I was stunned,” he said. “This was a true shock.”

This asteroid wasn’t one that scientists had been tracking, and it had seemingly appeared from “out of nowhere,” Michael Brown, a Melbourne-based observational astronomer, told The Washington Post. According to data from NASA, the craggy rock was large, an estimated 57 to 130 meters wide (187 to 427 feet), and moving fast along a path that brought it within about 73,000 kilometers (45,000 miles) of Earth. That’s less than one-fifth of the distance to the moon and what Duffy considers “uncomfortably close.”

https://www.washingtonpost.com/nation/2019/07/26/it-snuck-up-us-city-killer-asteroid-just-missed-earth-scientists-almost-didnt-detect-it-time/?utm_term=.53842ff32177

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'It snuck up on us': Scientists stunned by 'city-killer' asteroid that just missed Earth. (Original Post) Cattledog Jul 2019 OP
And it may try again. Comets tend to come around in cycles. gtar100 Jul 2019 #1
Ahhhh... NeoGreen Jul 2019 #2
Holy shit - high Earth orbit for satellites tops out at about 22,225 miles. NBachers Jul 2019 #3
Yikes! At least 3x the size of the one that exploded over Chelyabinsk... friendly_iconoclast Jul 2019 #4

gtar100

(4,192 posts)
1. And it may try again. Comets tend to come around in cycles.
Fri Jul 26, 2019, 01:44 PM
Jul 2019

It's best we ignore them and focus on killing each other with our bombs and guns.

NBachers

(17,080 posts)
3. Holy shit - high Earth orbit for satellites tops out at about 22,225 miles.
Fri Jul 26, 2019, 03:57 PM
Jul 2019

That asteroid was just a few blocks over.

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