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  • 1
    Electronic Resource
    Electronic Resource
    Solar system Portrait of a suburban family (2007)
    [s.l.] : Nature Publishing Group
    Nature 446 (2007), S. 273-274 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Collisional families — clusters of Solar System bodies formed when their parent body breaks up on being hit by a projectile — are familiar to astronomers. About 35 of them are known in the asteroid belt, the ring of small 'planetesimal' bodies confined between the orbits of Mars and ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/446273a
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  • 2
    Electronic Resource
    Electronic Resource
    Solar system Interplanetary kidnap (2006)
    [s.l.] : Nature Publishing Group
    Nature 441 (2006), S. 162-163 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The neptunian moon Triton weighs in at 1.4 times the mass of Pluto, making it the largest irregularly orbiting satellite in the Solar System. So how did this kept giant come to be where it is? On page 192 of this issue, Agnor and Hamilton advance a capture mechanism that, if correct, could ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/441162a
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  • 3
    Electronic Resource
    Electronic Resource
    Iron meteorites as remnants of planetesimals formed in the terrestrial planet region (2006)
    [s.l.] : Nature Publishing Group
    Nature 439 (2006), S. 821-824 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Iron meteorites are core fragments from differentiated and subsequently disrupted planetesimals. The parent bodies are usually assumed to have formed in the main asteroid belt, which is the source of most meteorites. Observational evidence, however, does not indicate that differentiated bodies ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/nature04536
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  • 4
    Electronic Resource
    Electronic Resource
    The formation of the Kuiper belt by the outward transport of bodies during Neptune's migration (2003)
    [s.l.] : Macmillian Magazines Ltd.
    Nature 426 (2003), S. 419-421 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The ‘dynamically cold Kuiper belt’ consists of objects on low-inclination orbits between ∼40 and ∼50 au from the Sun. It currently contains material totalling less than a tenth the mass of the Earth, which is surprisingly low because, according to accretion models, ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/nature02120
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  • 5
    Electronic Resource
    Electronic Resource
    Asteroids falling into the Sun (1994)
    [s.l.] : Nature Publishing Group
    Nature 371 (1994), S. 314-317 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] In order to understand the dynamics of near-Earth asteroids (NBAs) over timescales comparable to their lifetimes and the evolutionary pathways between different types of orbits, we have integrated numerically the orbits of two samples of NEAs. The first sample consisted of 26 objects, ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/371314a0
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  • 6
    Electronic Resource
    Electronic Resource
    The main secular resonances ν6, vs and ν16 in the asteroid belt (1991)
    Springer
    Celestial mechanics and dynamical astronomy 51 (1991), S. 169-197 
    Details
    ISSN: 1572-9478
    Keywords: asteroid belt ; secular resonance ; action angle variables ; surface of section ; numerical simulation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract In this paper an analytical model, suitable for a global description of the dynamics in a secular resonance of order 1, is derived from the general perturbation study developed in a previous paper (Morbidelli and Henrard (1991)). Such a model is then used to study the secular resonances ν6, ν5 and ν16, and pictures illustrating the secular motion are obtained. The peculiarities of the ν5 resonances are discussed in detail. The results are compared with those obtained by the theories of Yoshikawa and Nakai-Kinoshita. Some numerical simulations performed by Ch. Froeschlé and H. Scholl are discussed in the light of the new theoretical results. New numerical experiments on the ν6 resonance are also presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00048607
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  • 7
    Electronic Resource
    Electronic Resource
    The main mean motion commensurabilities in the planar circular and elliptic problem (1993)
    Springer
    Celestial mechanics and dynamical astronomy 57 (1993), S. 99-108 
    Details
    ISSN: 1572-9478
    Keywords: mean motion resonances ; secondary resonances ; secular resonances ; planar circular and elliptic restricted problem ; action-angle variables ; surfaces of section
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We study the motion of asteroids in the main mean motion commensurabilities in the frame of the planar restricted three-body problem. No assumption is made about the size of the eccentricity of the asteroid. At small to moderate eccentricity, we recover existing results (shape of the phase space and location of secondary resonances). We also provide global pictures of the dynamics in the region of secondary resonances. At high eccentricity, the phase space portraits of the integrable part of the Hamiltonian show new families of stable orbits for the 3:2 and 2:1 cases and the secular resonances ν5 and ν6 are located.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00692465
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  • 8
    Electronic Resource
    Electronic Resource
    On the successive elimination of perturbation harmonics (1993)
    Springer
    Celestial mechanics and dynamical astronomy 55 (1993), S. 101-130 
    Details
    ISSN: 1572-9478
    Keywords: action-angle variables ; resonances ; chaotic motion ; perturbation theories ; KAM theorem
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A practical method for the detailed exploration of two degrees of freedom dynamical systems is presented in this paper. This method is made up of several steps, in each of which we eliminate, via the introduction of suitable action-angle variables, the most relevant harmonic present in the Fourier expansion of the perturbation. In this way, at the end, one obtains a satisfactory description of the fine structure of secondary resonances, as well as detailed information about the size of chaotic layers and about the localization of regions filled up with invariant tori.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00692424
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  • 9
    Electronic Resource
    Electronic Resource
    Quantitative perturbation theory by successive elimination of harmonics (1993)
    Springer
    Celestial mechanics and dynamical astronomy 55 (1993), S. 131-159 
    Details
    ISSN: 1572-9478
    Keywords: Perturbation methods ; KAM theorem ; Nekhoroshev theorem ; action-angle variables
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We revisit some results of perturbation theories by a method of successive elimination of harmonics inspired by some ideas of Delaunay. On the one hand, we give a connection between the KAM theorem and the Nekhoroshev theorem. On the other hand, we support in a quantitative fashion a semi-numerical method of analysis of a perturbed system recently introduced by one of the authors.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00692425
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  • 10
    Electronic Resource
    Electronic Resource
    Proper elements for highly inclined asteroidal orbits (1994)
    Springer
    Celestial mechanics and dynamical astronomy 60 (1994), S. 29-56 
    Details
    ISSN: 1572-9478
    Keywords: asteroids ; proper elements ; averaging method
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Based on Williams' work and rewritten in action angle variables, a method for the calculation of proper elements is here presented. The averaging over the long periodic terms is performed by the semi numerical method developed by Henrard (1990); no series expansion in eccentricity or inclination of the asteroid is used which allows calculating proper elements for highly inclined orbits. Conversely, the theory is truncated at the first degree in the eccentricity and the inclination of the perturbing planets. A few tests about accuracy and consistency are presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00693091
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