High-order librations of Halley-type comets

  • A. Carusi
  • L. Kresák
  • E. Perozzi
  • G. B. Valsecchi
Conference paper

Summary

Halley-type comets, usually referred to as those with revolution periods of 20 to 200 yr, can be dynamically defined by the values of their Tisserand invariants with respect to Jupiter, which account for the processes that brought these comets into the present orbits. Long-term integrations of their motion show oscillations of their heliocentric elements when the comets are far from the Sun and the centre of their motion is the barycentre of the solar system. The shift from barycentric to heliocentric motion is also responsible for the major changes of orbital elements within a single revolution which, in the case of direct orbits, may follow regular libration patterns with typical periods of 350–400 yr. This is the reason for the concentration of periods around 70 yr. Some examples of this behaviour and a short discussion of its importance for the dynamical history of Halley-type comets are presented.

Key words

comets Halley-type comets resonances 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Carusi, A., Kresák, L., Perozzi, E., Valsecchi, G. B.: 1985 a, Long-term Evolution of Short-period Comets, A. Hilger, BristolGoogle Scholar
  2. Carusi, A., Kresák, L., Perozzi, E., Valsecchi, G.B.: 1985b, in Dynamics of Comets: their Origin and Evolution, eds. A. Carusi, G. B. Valsecchi, Reidel, Dordrecht, p. 319CrossRefGoogle Scholar
  3. Carusi, A., Valsecchi, G. B.: 1985, in Dynamics of Comets: their Origin and Evolution, eds. A. Carusi, G. B. Valsecchi, Reidel, Dordrecht, p. 261CrossRefGoogle Scholar
  4. Everhart, E.: 1973, Astron. J. 78, 329ADSCrossRefGoogle Scholar
  5. Kozai, Y.: 1979, in Dynamics of the Solar System, ed. R.L. Duncombe, Reidel, Dordrecht, p. 231Google Scholar
  6. Kresák, L.: 1972, Bull. Astron. Inst. Czechosl. 23, 1ADSGoogle Scholar
  7. Kresák, L.: 1981, Bull. Astron. Inst. Czechosl. 32, 321ADSGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 1988

Authors and Affiliations

  • A. Carusi
    • 1
  • L. Kresák
    • 2
  • E. Perozzi
    • 1
  • G. B. Valsecchi
    • 1
  1. 1.IAS — Reparto di PlanetologiaRomeItaly
  2. 2.Astronomical InstituteSAVBratislavaCzechoslovakia

Personalised recommendations