This story begins approximately a year back. In February 23,
2012, a free asteroid was discovered. It was calculated that this asteroid
would travel very close to Earth on February 15, 2013. This asteroid was named
2012 DA14. This asteroid was approximately 50 meters in diameter. The asteroid
was said to travel as close as 30,000 km from Earth which is closer than the
Geosynchronous orbit (Orbits of Geosynchronous Satellites).
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| An Artistic Impression of Earth and Asteroid 2012 DA14 |
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| Trajectory of Asteroid 2012 DA14 |
About 15 hours before the passing of this asteroid there was
a meteor event near Chelyabinsk, Russia. An object (now called Chelyabinsk
Meteor) from space entered the Earth’s atmosphere thereby becoming a fireball.
This object was estimated to be of a diameter of 17 meters. This object was
undetected until it reached the atmosphere due to its relatively small size.
This object was said to have been travelling at a speed of 108000 km/h before
impact. The energy released by this meteor was said to be 500 kilotons of TNT
which is 20-30 times more than that of the atom bombs of Hiroshima and
Nagasaki. This energy created a shock wave which injured about 1200 people
mainly due to the glass shattered from windows. Three impact sites of the
meteor were found. One of the impact sites had fragments of the meteorite.
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| Trail left over by Chelyabinsk Meteor |
NASA and ESA (European Space Agency) confirmed that the Chelyabinsk
Meteor had nothing to do with the asteroid 2012 DA14. The asteroid continued to
pass through about 15 hours after the event. They are still investigating on
the meteor.
A video of the Meteor and the shock wave it left
2 comments:
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