![]() ![]() Near-Earth asteroids as large or larger than this (Mainzer, A. Surveys of the near-EarthĪsteroid population indicate that we expect that there are only 227 Thus the Chelyabinsk object might have beenĮjected from 86039 by a collision with another asteroidĪsteroid 86039 is unusually large for a near-EarthĪsteroid with an estimated 2.22 km diameter (Delbo etĪl. That is well in line with the collision speeds of asteroids which are (corresponding to 3600 km per hour or 2200 miles per hour) but one 'kick' needed to move from the orbit of 86039 to that of ChelyabinskĬorresponds to a speed of about 1 kilometer per second, a sizable kick The orbits of the bodies also pass near each other, aĬondition that has persisted for at least the last thousand years. LL5 chondrite, the type of rock dropped at the end of its flight as This just a chance alignment or an indication of some deeperĬonnection? Asteroid 86039 is the right colour (technically spectral (1999 NC43) are similar, as illustrated in the animation on the left. The orbits of the Chelyabinsk asteroid and near-Earth The Chelyabinsk asteroid (red) and asteroid 86039 (green). The total mass of surviving fragments larger than Pieces between the altitudes of 45 and 30 km, saving the ground from Megapascal, was similar to that of smaller meteoroids and corresponds The bulk strength of the Chelyabinsk asteroid, at about 1 Suggest the Chelyabinsk meteoroid may once have been part of that (1999 NC43), to a degree of statistical significance sufficient to Was similar to the orbit of the 2-km-diameter asteroid 86039 An analysis of selected video records of theĬhelyabinsk meteor of 15 February 2013 revealed it had an energyĪn analysis of its trajectory from video records (such as these: Near the Marshall Islands in 1994, both with energies of several tens Most energetic airburst events occurred over Indonesia in 2009 and Represents an energy of 4.185x10 12joules). Of energy equivalent to 5000-15000 kilotons of TNT (1 kiloton of TNT Over the Tunguska river in Siberia in 1908, producing an airburst The largest encounter in historical times occurred Present a definitive analysis of the asteroidal fragment thatīurned up so spectacularly over the Russian city of ChelyabinskĮarth is continuously colliding with fragments of asteroids and comets ![]() of Physics and Astronomy, The University of Western Ontario, London Ontario N6A 3K7, CanadaģCentre for Planetary Science and Exploration, University of Western Ontario, London Ontario N6A 5B7, CanadaĤInstitute of Rock Structure and Mechanics, Academy of Sciences of the Czech Republic, V Holesovickach 41, CZ-18209 Praha 8, Czech Republic. Jiri Borovicka 1, Pavel Spurny 1, Peter Brown 2,3, Paul Wiegert 2,3, Pavel Kalenda 4, David Clark 2,3, Lukas Shrbeny 1ġAstronomical Institute, Academy of Sciences of the Czech Republic, CZ-251 65 Ondrejov, Czech Republic.ĢDept. Date accessed: July 1, 2020.The trajectory, structure and origin of the Chelyabinsk asteroidal impactor The trajectory, structure and origin of the Chelyabinsk asteroidal impactor (5) Notkin, G., Have you found a space rock?: An introductory guide to meteorite identification:. (4) Lotzof, K., Types of meteorites: The Natural History Museum, London. (3) Meteorites For Sale, How to Identify Meteorites: The Meteorite Exchange, Inc. (2) NASA Science, 2019, Meteors & Meteorites. (1) Smithsonian National Museum of Natural History, Meteorites: Messengers From Outer Space.
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