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Thread: 2012 TC4 Asteroid flyby, 12 October 2017

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    Default 2012 TC4 Asteroid flyby, 12 October 2017

    Asteroid flyby in October: A drill for the end of the world?

    Doyle Rice, USA TODAY Published 4:59 p.m. ET Aug. 2, 2017 | Updated 8:26 p.m. ET Aug. 2, 2017

    https://www.usatoday.com/story/tech/...asa/533298001/
    AFTER I READ THIS I HAD,
    1ST: A BAD FEELING THEN STARTED TO SEE THIS A DIFFERENT WAY. FIRST: 4,200 MILES IS NOT THAT FAR FOR A MISS,

    As it starts to approach Earth this summer, large telescopes will be used to detect it and re-establish the asteroid's precise trajectory. WHAT! THERE ISN'T THAT MUCH ROOM FOR ERROR 4,200 MILES......

    2ND: IS THIS FEAR PORN OR ARE THEY TELLING US A LIE AND THIS IS GOING TO HIT.
    OR, IT COULD BE THE NEXT THING THAT WE HAVE TO SPEND MONEY ON TO MAKE
    US SAFE. SPACE PROTECTION 101.
    THERE IS A T.V. SERIES CALL : SALVATION , IT IS BASED ON DIVERTING AN ASTEROID
    FROM HITTING EARTH. ERIE COINCIDENCE ...

    WHERE TO WATCH SALVATION:
    http://mywatchseries.to/serie/salvation

    The Double Asteroid Redirection Test hopes to move near-Earth threats away from our planet. Video provided by Newsy Newslook


    Are we ready for an asteroid impact?

    This October, NASA will conduct a drill to see how well its planetary defense system would work if an actual asteroid were heading straight for Earth. While these sort of drills have been done in the past with pretend asteroids, this one will feature a real asteroid, one that astronomers are confident will miss the Earth as it zooms by on Oct. 12.

    "The question is: How prepared are we for the next cosmic threat?" said Vishnu Reddy of the University of Arizona and NASA consultant. "So we wanted to test how ready we are for a potential impact by a hazardous asteroid," he said.

    "Scientists have always appreciated knowing when an asteroid will make a close approach to and safely pass the Earth because they can make preparations to collect data to characterize and learn as much as possible about it," said Michael Kelley, a NASA program scientist.

    More: NASA is hiring a Planetary Protection Officer to protect Earth from alien harm

    The asteroid has not been seen since its 2012 discovery, when it sped past Earth at about one-fourth the distance from Earth to the moon. It's been too distant and too faint to be detected over the last five years. As it starts to approach Earth this summer, large telescopes will be used to detect it and re-establish the asteroid's precise trajectory.

    The asteroid, known as 2012 TC4, could come as close as 4,200 miles to Earth, NASA said. That's actually fairly close, when you consider that the moon is about 239,000 miles away.

    The space rock measures somewhere between 30 and 100 feet long, roughly the same size as the asteroid that exploded over Chelyabinsk, Russia, on Feb. 15, 2013.

    While NASA estimated that object was only about the size of a bus and weighed an estimated 7,000 tons, it exploded with the force of 20 atomic bombs.
    A meteor streaked across the sky of Russia's Ural Mountains

    A meteor streaked across the sky of Russia's Ural Mountains on Feb. 15, 2013. It injured over 1,000 people and damaged thousands of buildings, roofs, and windows.

    NASA said that an impact of an object the size of the one that exploded over Chelyabinsk takes place once or twice a century.

    NASA's Planetary Defense Coordination Office, which is leading the October drill, is the federal entity in charge of coordinating efforts to protect Earth from hazardous asteroids. It's responsible for finding, tracking and characterizing potentially hazardous objects coming near Earth and issuing warnings about possible impacts, should there be an actual threat.

    To deflect an asteroid on a collision course with Earth would have to be done years in advance of the predicted impact. The two most promising techniques that NASA is investigating are the "kinetic impactor" (hitting an asteroid with an object to slightly slow it down) and the "gravity tractor" (gravitationally tugging on an asteroid by putting a large mass near it).

    Fortunately, no known asteroid poses a significant risk of impact with Earth over the next 100 years, according to NASA.
    Last edited by ramus; 14th August 2017 at 12:50.

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    Default Re: 2012 TC4 Asteroid flyby, 12 October 2017

    What are they going to use to move the gravity attractor into place? A smaller gravity attractor?

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    Default Re: 2012 TC4 Asteroid flyby, 12 October 2017

    There is a many ways this can be looked at: Money grab since the terrorist thing is loosing ground. Alien invasion is to hard to sell.. Lets go space threats.

    Or tptb .... We told you it was coming ...after it hits... Or, this explains all the space activity going on ,space launches , different countries increase in space

    projects private and governmental.

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    Default Re: 2012 TC4 Asteroid flyby, 12 October 2017

    No matter how clean someone are,it deserves a bath from time to time.



    After terrorists,asteroid/s threat is on the third place and the alien invasion will be next.After that they'll start over again.
    So predictable and nothing to fear about.

    Tom & Jerry Baby Puss: Tarjama Dance
    "Your planet is forbidden for an open visit - extremely aggressive social environment,despite almost perfect climatic conditions.Almost 4 billion violent deaths for the last 5000 years and about 15000 major military conflicts in the same period."

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    Default Re: 2012 TC4 Asteroid flyby, 12 October 2017

    Cute, EFO!

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    Default Re: 2012 TC4 Asteroid flyby, 12 October 2017

    Quote Posted by Foxie Loxie (here)
    Cute, EFO!
    What can I say,Foxie Loxie?Today's gloom and doom news always deserve an innocent big smile.
    Sort of:


    "Your planet is forbidden for an open visit - extremely aggressive social environment,despite almost perfect climatic conditions.Almost 4 billion violent deaths for the last 5000 years and about 15000 major military conflicts in the same period."

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    Default Re: 2012 TC4 Asteroid flyby, 12 October 2017

    HERE'S MORE ON THE TC4 ASTEROID ... IT BEGS THE QUESTION, IF THE TC4 2012 FLY-BY WAS 31,000 MILES FROM EARTH ... AND AGAIN .. 10-12-2017 AT 4,200 MILES

    26,000 MILES CLOSER .... IN 5 YEARS WHERE IS THE PATH AND WHO IS IN THE WAY ??

    https://en.wikipedia.org/wiki/2012_TC4

    2012 TC4 is an Apollo near-Earth asteroid roughly 20 meters in diameter. On October 12, 2017 at 5:42 UT, the asteroid will pass 0.00033 AU (49,000 km; 31,000 mi) from Earth.[7] NEODyS shows there is no chance of an Earth impact before October 12, 2050.[8] The asteroid rates -3.66 on the Palermo scale, with a 1 in 630 chance of impact over the next hundred years.[9]

    The asteroid was not expected to become bright enough to recover with automated astronomical surveys until early September,[10] but it was successfully recovered with the Very Large Telescope (VLT) on July 27, 2017 at an apparent magnitude of 26.8,[11] making it one of the dimmest asteroid recoveries ever. As such, 2012 TC4 has become the first known asteroid ever to be observed passing less than 1 Lunar distance from Earth twice in a row.

    2012 TC4 will reach a maximum apparent magnitude of 12.8 just prior to its closest approach, soon after which it will appear to be too close to the Sun to be seen with telescopes.[12]

    Contents

    1 2012
    2 2017
    3 Rotation
    4 See also
    5 References
    6 External links

    2012

    2012 TC4 was discovered on October 4, 2012 at apparent magnitude 20.1 while the asteroid was 0.03 AU (4,500,000 km; 2,800,000 mi) from Earth.[2] During the 2012 close approach, the asteroid only had an observation arc of 7 days, between October 4, 2012, and October 11, 2012, so the exact distance of the 2017 closest approach was poorly constrained. With the 7 day observation arc, the asteroid had a 3-sigma chance of passing between 0.00008818 and 0.002896 AU (0.034 to 1.127 LD, 13,200–433,200 km, 8,200-269,200 mi) from Earth on October 12, 2017.[13] Astronomers were certain that it would not pass closer than 6,800 km from the surface of Earth.[14] The asteroid had been known to make close approaches to Earth in the past, including the approach of 0.000634 AU (0.247 LD, 94,800 km, 58,900 mi) on October 12, 2012,[7] during the apparition for which the asteroid was discovered.

    Paul Chodas of NASA's Center for Near-Earth Object Studies, and Vishnu Reddy of the University of Arizona's Lunar and Planetary Laboratory, viewed the 2017 flyby (inside of the orbit of the Moon) as a way to test and refine the global asteroid detection and tracking network designed to give warning of objects heading toward Earth.[14] Reddy coordinated the effort, involving over a dozen institutions worldwide.[14][15]
    2017

    The asteroid was recovered with the Very Large Telescope on July 27, 2017 at apparent magnitude 26.8 while the asteroid was 0.4 AU (60,000,000 km; 37,000,000 mi) from Earth.[11] At the time of recovery the asteroid was about 100 million times fainter than what can be seen with the naked eye[16] and 500 times fainter than when it was discovered in 2012. As of result of the 2017 recovery observations, it is known that on October 12, 2017 at 5:42 UT, the asteroid will pass 0.00033 AU (49,000 km; 31,000 mi) from Earth.[7] Then at 19:19 UT, the asteroid will pass 0.00185 AU (277,000 km; 172,000 mi) from the Moon.[7] The asteroid will peak at about apparent magnitude 12.8,[12] and will be too faint to be seen without a telescope.
    Rotation

    Studies of the asteroid's light curve found it to have a rotation period of approximately 12 minutes and 14 seconds,[4] relatively slow for asteroids of its size (10–20 meter). As a comparison, asteroid 2014 RC, a similarly-sized NEO, has a rotation period of only 16 seconds.
    See also

    List of asteroid close approaches to Earth
    List of asteroid close approaches to Earth in 2012
    List of asteroid close approaches to Earth in 2017
    NASA Planetary Defense Coordination Office
    Sentry Risk Table

    References

    "A Very Close Encounter". www.eso.org. Retrieved 11 August 2017.
    "MPEC 2012-T18 : 2012 TC4". IAU Minor Planet Center. 2012-10-07. Retrieved 2017-03-14. (K12T04C)
    "JPL Small-Body Database Browser: 2012 TC4". JPL. NASA. Archived from the original on 22 October 2014. Retrieved 1 April 2016.
    "Polishook 2013, MPB 40, 42". ADS. Minor Planet Bulletin. Bibcode:2013MPBu...40...42P. Retrieved 22 October 2014.
    "NEODyS-2 2012TC4". Department of Mathematics, University of Pisa, Italy. Retrieved 2017-03-13.
    "IAU Minor Planet Center - 2012 TC4". Minor Planet Center. IAU. Archived from the original on 22 October 2014. Retrieved 22 October 2014.
    "Close Approach table for 2012 TC4". JPL. NASA. Retrieved 22 October 2014.
    "NEODyS-2 2012TC4 Impactor Table". Department of Mathematics, University of Pisa, Italy. Archived from the original on 7 August 2017. Retrieved 2017-08-07.
    "Earth Impact Risk Summary: 2012 TC4". NASA/JPL Near-Earth Object Program Office. Archived from the original on 2012-11-24. Retrieved 2017-03-13.
    "NEODyS-2 Possible recovery list". Department of Mathematics, University of Pisa, Italy. Retrieved 2017-03-14.
    "MPEC 2017-P26 : 2012 TC4". IAU Minor Planet Center. 2017-08-06. Retrieved 2017-08-06. (K12T04C)
    "2012TC4 Ephemerides for 12 October 2017". NEODyS (Near Earth Objects – Dynamic Site). Retrieved 2017-08-07.
    "Close Approach table for 2012 TC4 (using 7 day obs arc)". JPL. NASA. Retrieved 22 October 2014.
    "Asteroid Flyby Will Benefit NASA Detection and Tracking Network". JPL. NASA. 2017-07-28.
    CNN, Nancy Coleman (1 August 2017). "NASA's planetary defense system will be put to the test in October". CNN. Retrieved 2 August 2017.

    Math: ( 100 5 ) 26.8 − 6.5 ≈ 131800000 {\displaystyle ({\sqrt[{5}]{100}})^{26.8-6.5}\approx 131800000} {\displaystyle ({\sqrt[{5}]{100}})^{26.8-6.5}\approx 131800000}

    External links

    2012 TC4 at the JPL Small-Body Database Edit this at Wikidata
    Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

    TECA Table of asteroids next close approaches to the Earth — Sormano Astronomical Observatory
    Image and animation of 2012 TC4 - Virtual Telescope Project

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    Default Re: 2012 TC4 Asteroid flyby, 12 October 2017

    I couldnt get the link to work for me but I found it on putlocker

    http://putlockers.fm/watch/OGg1oavR-...-season-1.html

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    Default Re: 2012 TC4 Asteroid flyby, 12 October 2017

    Quote Posted by ramus (here)
    HERE'S MORE ON THE TC4 ASTEROID ... IT BEGS THE QUESTION, IF THE TC4 2012 FLY-BY WAS 31,000 MILES FROM EARTH ... AND AGAIN .. 10-12-2017 AT 4,200 MILES
    You're reading it wrong. 31,000 miles is the predicted ('average') closest distance from us it'll come this October. (But, that's pretty close.)

    4,200 miles – which is really close, for sure — is the closest it might possibly come, in terns of margins of error of the calculations.

    There's also nothing that definitely happens with these kinds of orbits (which are pretty complex) that means the object always gets closer and closer each fly-past. If that was how it worked, the human race would have been wiped out hundreds of thousands of years ago, and none of us would be here.

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    Default Re: 2012 TC4 Asteroid flyby, 12 October 2017

    Always remember that Jupiter (our great protector) attracts 99.9 period percent of all object on collisioncourse earth. Since it has such a great gravitational pull. The Romans knew it, they put their faith in Jupiter to protect them
    Thats why i regard most of the comet stories as fearporn / soonporn.
    Last edited by uzn; 15th August 2017 at 05:51.

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    Default Re: 2012 TC4 Asteroid flyby, 12 October 2017

    Quote Posted by uzn (here)
    Always remember that Jupiter (our great protector) attracts 99.9 period percent of all object on collisioncourse earth. Since it has such a great gravitational pull. The Romans knew it, they put their faith in Jupiter to protect them
    Thats why i regard most of the comet stories as fearporn / soonporn.
    Comet / Asteroid - whatever !

    99.9% I'm not worried about - it's the 0.1% that makes me feel uncomfortable - especially in light of the recent near miss over Russia and the numerous fireballs being seen.

    and if it is as close as it appears its going to be this time - how close will it be on next pass in a few more years ?
    Last edited by Did You See Them; 15th August 2017 at 12:26.

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    Default Re: 2012 TC4 Asteroid flyby, 12 October 2017

    Our satellites are at 22,000 miles from earth, they have stated that tc4 could pass between them and earth. that's close, hope it doesn't hit the satellites....

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    Default Re: 2012 TC4 Asteroid flyby, 12 October 2017

    Quote Posted by Did You See Them (here)
    and if it is as close as it appears its going to be this time - how close will it be on next pass in a few more years ?
    —>
    Quote Posted by Bill Ryan (here)
    There's also nothing that definitely happens with these kinds of orbits (which are pretty complex) that means the object always gets closer and closer each fly-past. If that was how it worked, the human race would have been wiped out hundreds of thousands of years ago, and none of us would be here.
    and
    Quote Posted by ramus (here)
    Our satellites are at 22,000 miles from earth, they have stated that tc4 could pass between them and earth. that's close, hope it doesn't hit the satellites....
    It'd be a freakish, highly unlikely event if it did... like hitting one bullet with another bullet.

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    Default Re: 2012 TC4 Asteroid flyby, 12 October 2017

    Like a buss hitting a Volkswagen on exact course .....very small chance , yes.

    Why the open conversation on the object ? .. no risk .... or control of the information

    or just another distraction, or nothing at all ....looking at all the choices they're all

    good. It Just jumped at me ...............
    Last edited by ramus; 16th August 2017 at 01:52.

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    Default Re: 2012 TC4 Asteroid flyby, 12 October 2017

    I was surprised to see this news on a live show I watch.
    The Host spelled doom and the end.
    However, when I looked around on the internet, I didn't find any collision forecasts.

    Here's an article. Perhaps this was already discussed on the forum, but I would still like people's input!

    http://earthsky.org/space/near-earth...s-october-2017

    Quote The Center for Near Earth Object Studies (CNEOS) at NASA’s Jet Propulsion Laboratory in Pasadena, California has had its eye on a small asteroid, designated 2012 TC4, that will pass close to Earth on October 12, 2017. These experts have said that, even though they can’t yet predict exactly how close it’ll come, they’re certain it’ll fly by at a safe distance. That safe distance could be a very close shave, with the space rock passing no closer than 4,200 miles (6,800 km) from our planet. Or it could be a more distant pass, some two-thirds the moon’s distance from Earth. Late in the day on Friday (July 28, 2017), scientists at the University of Arizona (UA) in Tucson, Arizona announced an international collaboration that is utilizing asteroid 2012 TC4 in an exercise to test NASA’s network of observatories and scientists who work with planetary defense.
    The article goes on to state that NASA will try out their planetary defence system. Now that will be worth observing!
    https://youtu.be/aRQxLcPrLes
    We all fall like snow, to melt and evaporate...

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    Default Re: 2012 TC4 Asteroid flyby, 12 October 2017

    Quote Posted by Yuki (here)
    I was surprised to see this news on a live show I watch.
    The Host spelled doom and the end.
    However, when I looked around on the internet, I didn't find any collision forecasts.

    Here's an article. Perhaps this was already discussed on the forum, but I would still like people's input!

    http://earthsky.org/space/near-earth...s-october-2017

    Quote The Center for Near Earth Object Studies (CNEOS) at NASA’s Jet Propulsion Laboratory in Pasadena, California has had its eye on a small asteroid, designated 2012 TC4, that will pass close to Earth on October 12, 2017. These experts have said that, even though they can’t yet predict exactly how close it’ll come, they’re certain it’ll fly by at a safe distance. That safe distance could be a very close shave, with the space rock passing no closer than 4,200 miles (6,800 km) from our planet. Or it could be a more distant pass, some two-thirds the moon’s distance from Earth. Late in the day on Friday (July 28, 2017), scientists at the University of Arizona (UA) in Tucson, Arizona announced an international collaboration that is utilizing asteroid 2012 TC4 in an exercise to test NASA’s network of observatories and scientists who work with planetary defense.
    The article goes on to state that NASA will try out their planetary defence system. Now that will be worth observing!
    I read about that too and the miss by 4200 miles. Extremely close! I believe Star Tsar posted something about that a few weeks ago.

    Last I read all telescopes would focus on it as it came around the sun for a precise distance.

    I think it was about the size of a house.

    Didn't here about the planetary defense though.

    Agreed, that will be worth observing!
    “To develop a complete mind: Study the art of science; study the science of art. Learn how to see. Realize that everything connects to everything else” – Leonardo Da Vinci

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    Default Re: 2012 TC4 Asteroid flyby, 12 October 2017

    Here is the thread on the asteroid AUG 14TH GO TO THE ORIGINAL POST THERE WAS A LOT SAID THEN . THE DISTANCES WERE WIDE SPREAD .

    14th August 2017 08:48 Link to Post #1
    ramus

    Default Asteroid flyby in October: A drill for the end of the world?

    Asteroid flyby in October: A drill for the end of the world?

    Doyle Rice, USA TODAY Published 4:59 p.m. ET Aug. 2, 2017 | Updated 8:26 p.m. ET Aug. 2, 2017

    https://www.usatoday.com/story/tech/...asa/533298001/
    AFTER I READ THIS I HAD,
    1ST: A BAD FEELING THEN STARTED TO SEE THIS A DIFFERENT WAY. FIRST: 4,200 MILES IS NOT THAT FAR FOR A MISS,

    As it starts to approach Earth this summer, large telescopes will be used to detect it and re-establish the asteroid's precise trajectory. WHAT! THERE ISN'T THAT MUCH ROOM FOR ERROR 4,200 MILES......

    2ND: IS THIS FEAR PORN OR ARE THEY TELLING US A LIE AND THIS IS GOING TO HIT.
    OR, IT COULD BE THE NEXT THING THAT WE HAVE TO SPEND MONEY ON TO MAKE
    US SAFE. SPACE PROTECTION 101.
    THERE IS A T.V. SERIES CALL : SALVATION , IT IS BASED ON DIVERTING AN ASTEROID
    FROM HITTING EARTH. ERIE COINCIDENCE ...

    WHERE TO WATCH SALVATION:
    http://mywatchseries.to/serie/salvation

    The Double Asteroid Redirection Test hopes to move near-Earth threats away from our planet. Video provided by Newsy Newslook


    Are we ready for an asteroid impact?

    This October, NASA will conduct a drill to see how well its planetary defense system would work if an actual asteroid were heading straight for Earth. While these sort of drills have been done in the past with pretend asteroids, this one will feature a real asteroid, one that astronomers are confident will miss the Earth as it zooms by on Oct. 12.

    "The question is: How prepared are we for the next cosmic threat?" said Vishnu Reddy of the University of Arizona and NASA consultant. "So we wanted to test how ready we are for a potential impact by a hazardous asteroid," he said.

    "Scientists have always appreciated knowing when an asteroid will make a close approach to and safely pass the Earth because they can make preparations to collect data to characterize and learn as much as possible about it," said Michael Kelley, a NASA program scientist.

    More: NASA is hiring a Planetary Protection Officer to protect Earth from alien harm

    The asteroid has not been seen since its 2012 discovery, when it sped past Earth at about one-fourth the distance from Earth to the moon. It's been too distant and too faint to be detected over the last five years. As it starts to approach Earth this summer, large telescopes will be used to detect it and re-establish the asteroid's precise trajectory.

    The asteroid, known as 2012 TC4, could come as close as 4,200 miles to Earth, NASA said. That's actually fairly close, when you consider that the moon is about 239,000 miles away.

    The space rock measures somewhere between 30 and 100 feet long, roughly the same size as the asteroid that exploded over Chelyabinsk, Russia, on Feb. 15, 2013.

    While NASA estimated that object was only about the size of a bus and weighed an estimated 7,000 tons, it exploded with the force of 20 atomic bombs.
    A meteor streaked across the sky of Russia's Ural Mountains

    A meteor streaked across the sky of Russia's Ural Mountains on Feb. 15, 2013. It injured over 1,000 people and damaged thousands of buildings, roofs, and windows.

    NASA said that an impact of an object the size of the one that exploded over Chelyabinsk takes place once or twice a century.

    NASA's Planetary Defense Coordination Office, which is leading the October drill, is the federal entity in charge of coordinating efforts to protect Earth from hazardous asteroids. It's responsible for finding, tracking and characterizing potentially hazardous objects coming near Earth and issuing warnings about possible impacts, should there be an actual threat.

    To deflect an asteroid on a collision course with Earth would have to be done years in advance of the predicted impact. The two most promising techniques that NASA is investigating are the "kinetic impactor" (hitting an asteroid with an object to slightly slow it down) and the "gravity tractor" (gravitationally tugging on an asteroid by putting a large mass near it).

    Fortunately, no known asteroid poses a significant risk of impact with Earth over the next 100 years, according to NASA.
    Last edited by ramus; 8th September 2017 at 13:55.

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    Default Re: 2012 TC4 Asteroid flyby, 12 October 2017

    AS DISCUSSED IN AN EARLIER THREAD, IT IS HERE NOW.

    Sci-Tech
    How to watch a house-sized asteroid buzz by Earth

    Asteroid 2012 TC4 is set to whiz by us at a distance that's safe but still uncomfortably close by
    Eric Mack

    https://www.cnet.com/news/watch-aste...th-october-12/

    October 11, 2017 9:39 AM PDT

    A cosmic close call is set to occur high above Earth late Wednesday night (Pacific time) when an asteroid the size of a house passes almost as close to us as some of the communications satellites that make it possible to read this story around the world.

    Asteroid 2012 TC4 is back for another visit almost four years to the day since it was seen for the first time zipping by our planet. This time there's a few ways you can watch the space rock's fly-by as it happens.

    A week after being discovered in October 2012, TC4 passed us at a distance of 58,900 miles (94,800 kilometers). This time it will come closest at approximately 10:41 p.m. PT Wednesday (5:41 UTC Thursday morning) when it slices by safely at a distance of about 31,000 miles (50,000 kilometers). For reference, satellites in geosynchronous orbit are at an altitude of about 22,236 miles (35,786 km). The asteroid will actually pass closer than some satellites in more elliptical orbits, like NASA's Interstellar Boundary Explorer.

    Observatories around the world have been working to track the asteroid over the past several weeks, using it as an exercise to test the early warning network that would be used should another future space rock pose a real threat of impact.
    ADVERTISING

    For backyard observers to catch a glimpse of 2012 TC4, you'll need a telescope with at least an 8-inch aperture and dark skies, according to Sky and Telescope.

    "Best viewing prospects for North America come... on October 11th, as 2012 TC4 glides southward through the constellations Capricornus, Microscopium and Sagittarius," writes David Dickinson. "South American observers get the very best view, as 2012 TC4 heads sunward in the predawn hours of October 12th."

    To help locate the asteroid, which should be approaching fast enough that you will actually see it moving in your viewfinder, use this handy online tracker for reference on its current position:

    If the skies are cloudy or just not dark enough where you are, there's a few options for watching the 2012 TC4 fly-by: online via the Slooh Observatory or below from the Virtual Telescope Project.

    If you miss it, don't worry. This rock will make many more passes in the future, all of them safe until at least 2050. So just exhale and enjoy the show.

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