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Languages: English
Types: Other
Subjects: TL
The fragmentation of an Earth threatening asteroid as a result of a hazard mitigation mission is examined in\ud this paper. The minimum required energy for a successful impulsive deflection of a threatening object is\ud computed and compared with the energy required to break-up a small size asteroid. The fragmentation of an asteroid that underwent an impulsive deflection such as a kinetic impact or a nuclear explosion is a very plausible outcome in the light of this work. Thus a model describing the stochastic evolution of the cloud of fragments is described. The stochasticity of the fragmentation is given by a Gaussian probability distribution that\ud describes the initial relative velocities of each fragment of the asteroid, while the size distribution is expressed\ud through a power law function. The fragmentation model is applied to Apophis as illustrative example. If a barely\ud catastrophic disruption (i.e. the largest fragment is half the size the original asteroid) occurs 10 to 20 years prior\ud to the Earth encounter only a reduction from 50% to 80% of the potential damage is achieve for the Apophis test\ud case.
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    • [1] Alvarez L.W., Alvarez W., Asaro F. and Michel H.V., "Extraterrestrial Cause for the CretaceousTertiary Extinction," Science, Vol. 208, No. 4448, 1980, pp. 1095-1108.
    • [2] Holsapple K.A., “The Scaling of Impact Processes in Planetary Science,” Annual Review of Earth and Planetary Science, Vol. 21, 1993, pp. 333-373.
    • [3] Ryan E.V. and Melosh H.J., "Impact Fragmentation: From the Laboratory to Asteroids," Icarus, Vol. 133, No. 1, 1998, pp. 1-24.
    • [4] Melosh H.J., Nemchinov I.V. and Zetzer Y.I., "Non-nuclear Strategies for Deflecting Comets and Asteroids," Hazard Due to Comets and Asteroids, edited by T.Gehrels University of Arizona, 1994, pp. 1110-1131.
    • [5] Ivashkin V.V. and Smirnov V.V., "An Analysis of Some Methods of Asteroid Hazard Mitigation for the Earth," Planetary and Space Science, Vol. 43, No. 6, 1994, pp. 821-825.
    • [6] Remo J.L., "Energy Requirements and Payload Masses for Near-Earth Objects Hazard Mitigation," Acta Astronautica, Vol. 47, No. 1, 2000, pp. 35-50.
    • [7] "Near-Earth Objects Survey and Deflection Analysis of Alternatives," National Aeronautics and Space Administration, NASA Authorization Act of 2005, 2007.
    • [8] Sanchez J.P., Colombo C., Vasile M. and Radice G., "Multi-criteria Comparison among Several Mitigation Strategies for Dangerous Near Earth Objects," Journal of Guidance, Control and Dynamics, to appear, 2008.
    • [9] Ahrens T.J. and Harris A.W., "Deflection and Fragmentation of Near-Earth Asteroids," Nature, Vol. 360, 1992, pp. 429-433.
    • [10] Stokes G.H., Yeomans D.K., and et.al., "Study to Determine the Feasibility of Extending the Search for Near-Earth Objects to Smaller Limiting Diameters," NASA, 2003.
    • [11] O'Brien D.P. and Greenberg R., "Steady-state size distributions for collisional populations: analytical solution with size-dependent strength," Icarus, Vol. 164, 2003, pp. 334-345.
    • [12] Holsapple K.A., "Catastrophic disruptions and cratering of solar system bodies: a review and new 12 results," Planetary and Space Science, Vol. 42, No. 12, 1994, pp. 1067-1078.
    • [13] Harris A.W., "The Rotation Rates of Very Small Asteroids: Evidence for 'Rubble Pile' Structure," Lunar and Planetary Science, Vol. 27, 1996, pp. 493.
    • [14] Chesley S.R. and Spahr T.B., "Earth Impactors: Orbital Characteristics and Warning Times," Mitigation of Hazardous Comets and Asteroids 2003.
    • [15] Vasile M. and Colombo C.. “Optimal Impact Strategies for Asteroid Deflection,” Journal of Guidance, Control and Dynamics, Vol.31, No.4, 2008.
    • [16]Tedeschi W.J., Remo J.L., Schulze J.F., and Young R.P., "Experimental Hypervelocity Impact Effects on Simulated Planetesimal Materials," International Journal of Impact Engineering, Vol. 17, 1995, pp. 837-848.
    • [17] McInnes C., "Deflection of Near-Earth Asteroids by kinetics Energy Impacts from Retrograde Orbits," Planetary and Space Science, Vol. 52, No. 7, 2004, pp. 587-590.
    • [18] Petropoulos A.E., Kowalkowski T.D., Vavrina M.A., Parcher D.W., Finlayson P.A., Whiffen G. J. and Sims J.A., "1stACT global trajectory optimisation competition: Results found at the Jet Propulsion Laboratory," Acta Astronautica, Vol. 61, 2007, pp. 806-815.
    • [19] Davis D.R. and Ryan E.V., "On Collisional Disruption: Experimental Results and Scaling Laws," Icarus, Vol. 83, No. 156, 1990, pp. 182.
    • [20] H.Goldstein, Mecánica Clásica, 1996, pp. 518- 520.
    • [21] Gault D.E., Shoemaker E. M., and Moore H.J., "Spray Ejected from the Lunar Surface by Meteoroid Impact," NASA Technical Note D1767, 1963.
    • [22] Wiesel W., "Fragmentation of Asteroids and Artificial Satellites in Orbit," Icarus, 1978, pp. 99- 116.
    • [23] Greenberg R., Wacker J.F., Hartmann W.K., and Chapman C.R., "Planetesimal to Planets: Numerical Simulations of Collisional Evolution," Icarus, Vol. 35, 1978, pp. 1-26.
    • [24] Mizutani H., Takagi Y. and Kawakami S.I., "New Scaling Laws on Impact Fragmentation," Icarus, Vol. 87, 1990, pp. 307-326.
    • [25] Hills J.G. and Goda M.P., "The Fragmentation of Small Asteroids in the Atmosphere," The Astronomical Journal, Vol. 105, No. 3, 1993, pp. 1114-1144.
    • [26]Chesley S.R. and Ward S.N., "A Quantitative Assessment of the Human and Economic Hazard from Impact-generated Tsunami," Natural Hazards, Vol. 38, 2006, pp. 355-374.
    • [27] Chapman C.R. and Morrison D., "Impacts on the Earth by asteroids and comets: assessing the hazard," Nature, Vol. 367, 1994, pp. 33-40.
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