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Lynn
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Message 1400034 - Posted: 7 Aug 2013, 7:05:18 UTC


Russian Meteor: Member of an Asteroid Gang?


On Feb. 15, when a 10,000 ton space rock slammed into the atmosphere over the city of Chelyabinsk, Russia, injuring over 1,500 people and causing millions of dollars in property damage, the world suddenly became aware that our planet lives in a cosmic shooting gallery. We had suffered a planetary flesh wound. Almost immediately after the event, the question on everyone’s mind was: When will the next asteroid hit?

I started a thread back then.
http://setiathome.berkeley.edu/forum_thread.php?id=70850


Here Are The 1400 Potentially Earth-Ending Asteroids Circling Our Planet


There are more than 1,400 potentially dangerous asteroids orbiting alongside the Earth, and any one of them is big enough to end humanity.





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Message 1400932 - Posted: 9 Aug 2013, 6:36:38 UTC - in response to Message 1400034.

One will be heading our way. Hope we can deflect one?? Asteroids pose a greater risk than the sun.

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Things are going to get a lot worse before they get worse.
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Message 1400937 - Posted: 9 Aug 2013, 7:05:16 UTC

Is it the ones we know about that are dangerous, or is the ones that we don't know about.

I heard somewhere that there are comets that have periods longer that the 200 years where we have reliable records. If one of these is heading our way we might at best have a few months to see it and act before it strikes.

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Message 1401168 - Posted: 9 Aug 2013, 18:09:36 UTC
Last modified: 9 Aug 2013, 18:09:48 UTC

I don't know how well known this video is, asteroid discovery from 1980 up to 2011. The red ones cross Earth's orbit.

http://youtu.be/ONUSP23cmAE

Read the "about" text on the original video (up to 2010) for a good explanation.

http://youtu.be/S_d-gs0WoUw

There are *a lot* of asteroids out there.

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Message 1401401 - Posted: 10 Aug 2013, 8:14:55 UTC - in response to Message 1401168.

There are *a lot* of asteroids out there.



There's a lot of everything out there...Lots of space...
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Message 1401413 - Posted: 10 Aug 2013, 8:52:09 UTC

A good answer. There is a lot more space than asteroids. In theory one day, one will hit us, statistically it has to happen. What will be the outcome no-one can say. If it's far enough in the future we may be able to detect it and deal with it beforehand. As of now we do what we can.

NEO watch

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Message 1403326 - Posted: 15 Aug 2013, 6:07:48 UTC - in response to Message 1401413.


Around the World in Four Days: NASA Tracks Chelyabinsk Meteor Plume


A meteor weighing 10,000 metric tons exploded 14 miles above Chelyabinsk, Russia, on Feb. 15, 2013. Unlike similar past events, this time scientists had the sensitive instruments on the Suomi NPP satellite to deliver unprecedented data and help them track and study the meteor plume for months.

Video included with link.

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Message 1403775 - Posted: 16 Aug 2013, 6:04:29 UTC

Interesting...Thanx for the link, Lynn!
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Message 1403809 - Posted: 16 Aug 2013, 7:58:43 UTC - in response to Message 1403326.


Around the World in Four Days: NASA Tracks Chelyabinsk Meteor Plume


A meteor weighing 10,000 metric tons exploded 14 miles above Chelyabinsk, Russia, on Feb. 15, 2013. Unlike similar past events, this time scientists had the sensitive instruments on the Suomi NPP satellite to deliver unprecedented data and help them track and study the meteor plume for months.

Video included with link.

It's a good thing this didn't happen 25 years ago. It might have triggered WWIII. Back then tracking wasn't as sophisticated as it is today and Moscow might have mistaken it for a US missile launch.
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Message 1404031 - Posted: 16 Aug 2013, 21:49:04 UTC

Good point Bob :-)

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Message 1404051 - Posted: 16 Aug 2013, 22:54:39 UTC - in response to Message 1403809.


Around the World in Four Days: NASA Tracks Chelyabinsk Meteor Plume


A meteor weighing 10,000 metric tons exploded 14 miles above Chelyabinsk, Russia, on Feb. 15, 2013. Unlike similar past events, this time scientists had the sensitive instruments on the Suomi NPP satellite to deliver unprecedented data and help them track and study the meteor plume for months.

Video included with link.

It's a good thing this didn't happen 25 years ago. It might have triggered WWIII. Back then tracking wasn't as sophisticated as it is today and Moscow might have mistaken it for a US missile launch.



Julie, your welcome!

Bob, +1

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Message 1406283 - Posted: 22 Aug 2013, 5:44:56 UTC - in response to Message 1404051.

I hate to be so gloomy about asteroids. NASA and WISE telescope, teamed up to go hunting. Asteroid-hunter. One jolt from the asteroid belt, we might be gone.


NASA WISE telescope gets new life as asteroid hunter


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Message 1406343 - Posted: 22 Aug 2013, 8:23:51 UTC

The Wide-field Infrared Survey Explorer, or WISE, telescope also will hunt for targets for a future mission to send a robotic spacecraft to rendezvous with a small asteroid and relocate all or part of it into a high orbit around the moon.

Sounds a bit futuristic but I suppose in theory doable.

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Message 1407020 - Posted: 23 Aug 2013, 18:43:00 UTC

Maybe this is something that Kepler could be reprogrammed to do.
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Message 1407034 - Posted: 23 Aug 2013, 19:16:28 UTC

The only way you could "re-locate" an asteroid would be to bolt rockets onto it and steer it like a shuttle craft docking at the ISS. Oh sorry, we don't do that any more do we, so when it happens we'll probably have forgotten how to.

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Message 1429451 - Posted: 16 Oct 2013, 23:04:59 UTC - in response to Message 1407034.

related:

Divers working at a Russian lake have recovered a half-tonne chunk of the space rock that exploded over Chelyabinsk earlier this year.

The object plunged into Lake Chebarkul in central Russia on 15 February, leaving a 6m-wide hole in the ice.

http://www.bbc.co.uk/news/science-environment-24550941


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Message 1430185 - Posted: 18 Oct 2013, 11:57:37 UTC

New Asteroid rated one of two most dangerous
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Message 1430872 - Posted: 19 Oct 2013, 22:26:03 UTC - in response to Message 1430185.

New Asteroid rated one of two most dangerous


Don't think I'll be around 2032.

A freshly discovered asteroid, with the classy name 2013 TV135, has a slight chance of smashing into Earth on August 26, 2032 and ruining everyone's day in a very big way.

http://www.theregister.co.uk/2013/10/18/were_doomed_again_as_astronomers_spot_asteroid_that_could_hit_earth_in_2032/




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Message 1430885 - Posted: 19 Oct 2013, 23:43:35 UTC - in response to Message 1430872.

Looks like this asteroid will be downgraded.

Newly discovered asteroid 2013 TV135 made a close approach to Earth on Sept. 16, when it came within about 4.2 million miles (6.7 million kilometers). The asteroid is initially estimated to be about 1,300 feet (400 meters) in size and its orbit carries it as far out as about three quarters of the distance to Jupiter's orbit and as close to the sun as Earth's orbit. It was discovered on Oct. 8, 2013, by astronomers working at the Crimean Astrophysical Observatory in Ukraine. As of Oct. 14, asteroid 2013 TV135 is one of 10,332 near-Earth objects that have been discovered.

http://www.nasa.gov/mission_pages/asteroids/news/asteroid20131017.html#.UmMW9VPTDSc




This diagram shows the orbit of asteroid 2013 TV135 (in blue), which has just a 1-in-63,000 chance of impacting Earth. Its risk to Earth will likely be further downgraded as scientists continue their investigations.

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Message 1439112 - Posted: 6 Nov 2013, 23:06:03 UTC - in response to Message 1430885.

Scientists studying the dramatic Chelyabinsk meteor that screamed through Russian skies this year have both good and bad news to report. The good news: The February fireball’s damage wasn’t nearly as terrible as predicted. The bad news? Near-Earth object impacts could be about 10 times more common than we thought they were.

Let's hope Scientists, are wrong.


http://www.latimes.com/science/sciencenow/la-sci-sn-chelyabinsk-meteor-asteroid-earth-20131106,0,2087690.story#axzz2juQIuFu2

Also..

A team of NASA and international scientists for the first time have gathered a detailed understanding of the effects on Earth from a small asteroid impact.

The unprecedented data obtained as the result of the airburst of a meteoroid over the Russian city of Chelyabinsk on Feb. 15, 2013, has revolutionized scientists' understanding of this natural phenomenon.

http://www.nasa.gov/content/nasa-and-international-researchers-obtain-crucial-data-from-meteoroid-impact/index.html#.UnrJ0CfTDSc
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