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Asteroids III, W. F. Bottke Jr., A. Cellino, P. Paolicchi, and R. P. Binzel (eds), University of Arizona Press, Tucson, p.573-584, March 2002
Mikko Kaasalainen, Petr Pravec, Lenka Љarounovб, Johanna Torppa, Jenni Virtanen, Sanna Kaasalainen, Anders Erikson, Andreas Nathues, Josef Durech, Marek Wolf, Johan S.V. Lagerros, Mats Lindgren, Claes-Ingvar Lagerkvist, Robert Koff, John Davies, Rita Mann, Peter Kuљnirбk, Ninel M. Gaftonyuk, Vasilij G. Shevchenko, Vasilij G. Chiorny, and Irina N. Belskaya, Photometry and models of eight near-Earth asteroids, Icarus 167 (2004) 178–196 https://doi.org/10.1016/j.icarus.2003.09.012
We present new observations and models of the shapes and rotational states of the eight near-Earth Asteroids (1580) Betulia, (1627) Ivar, (1980) Tezcatlipoca, (2100) Ra-Shalom, (3199) Nefertiti, (3908) Nyx, (4957) Brucemurray, and (5587) 1990 SB. We also outline some of their solar phase curves, corrected to common reference geometry with the models. Some of the targets may feature sizable global nonconvexities, but the observable solar phase angles were not sufficiently high for confirming these. None is likely to have a very densely cratered surface. We discuss the role of the intermediate topographic scale range in photometry, and surmise that this scale range is less important than large or small scale lengths.
P.Michel, Physical properties of Near-Earth Objects that inform mitigation, Acta Astronautica, Volume 90, Issue 1, September 2013, Pages 6-13, https://doi.org/10.1016/j.actaastro.2012.07.022
Various methods have been proposed to avoid the collision of a Near-Earth Object (NEO) with the Earth. Each of these methods relies on a mitigation concept (deflection or fragmentation), an energy source (e.g. kinetic, gravitational, solar, thermal, etc.) and a mode of approach (e.g. remote station and interaction). The efficiency of each method depends on the physical properties of the considered NEO that influence the way the body will respond to the considered energy source. While the knowledge of properties such as the mass, spin rate and obliquity as well as the shape is generally required for all mitigation methods, there are other properties that are important to know for some methods and that have no great influence for other ones. This paper summarizes the current knowledge of main physical properties of NEOs and their importance for the most usual mitigation strategies that have been proposed, i.e. the kinetic impactor, the gravity tractor, strategies based on anchoring or depositing material on the surface, and strategies aimed at modifying the thermal properties of the NEO in order to either modify or cancel the Yarkovsky effect, or cause surface vaporization. |