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Originally posted by Doodle19815
reply to post by TheProphetMark
Watched the video and had to giggle when she said "it won't be cataclysmic unless you happen to be near it."
Gee, I guess I better plan not to be near it!
Sorry, I have a strange sense of humor tonight.
Originally posted by 1nquisitive
Asteroid 2012-DA14 will pass Earth closely on Feb. 15, 2013 (NASA).
2012 DA14 is a near earth asteroid with an estimated diameter of about 45 meters (148 ft) and an estimated mass of about 130,000 metric tons. It was discovered on February 23, 2012, by the OAM Observatory, La Sagra in Spain (J75) seven days after passing 0.0174 AU (2,600,000 km; 1,620,000 mi) from Earth on February 16. Calculations show that on February 15, 2013, the distance between the asteroid and Earth will be 0.000228 AU (34,100 km; 21,200 mi).
Originally posted by Hijinx
reply to post by Divine Strake
Given the amount of atmosphere between you and DA-14 2012, I'm not sure you'd need any protection, but if you must I think your regular old run of the mill seran wrap would do. DA-14 is very unlikely to touch solid ground, even if it were to enter our atmosphere, but if any of it did, it would be no bigger than a pea.
Crater shape is normal in spite of atmospheric crushing; fragments are not significantly dispersed.
Transient Crater Diameter: 2.53 km ( = 1.57 miles )
Transient Crater Depth: 893 meters ( = 2930 feet )
Final Crater Diameter: 3.16 km ( = 1.96 miles )
Final Crater Depth: 672 meters ( = 2200 feet )
The crater formed is a simple crater.
The floor of the crater is underlain by a lens of broken rock debris (breccia) with a maximum thickness of 312 meters ( = 1020 feet ).
The volume of the target melted or vaporized is 0.00635 km^3 ( = 0.00152 miles^3 )
Roughly half the melt remains in the crater
The major seismic shaking will arrive approximately 20 seconds after impact.
Richter Scale Magnitude: 6.1
Mercalli Scale Intensity at a distance of 100 km:
Felt indoors by many, outdoors by few during the day. At night, some awakened. Dishes, windows, doors disturbed; walls make cracking sound. Sensation like heavy truck striking building. Standing motor cars rocked noticeably.
Felt by nearly everyone; many awakened. Some dishes, windows broken. Unstable objects overturned. Pendulum clocks may stop.
The air blast will arrive approximately 5.05 minutes after impact.
Peak Overpressure: 3850 Pa = 0.0385 bars = 0.547 psi
Max wind velocity: 8.94 m/s = 20 mph
Sound Intensity: 72 dB (Loud as heavy traffic)