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Comets and the Missing Planet

Published online by Cambridge University Press:  12 April 2016

Michael W. Ovenden  and
John Byl
Michael W. Ovenden
Affiliation:
Department of Geophysics and Astronomy, University of British Columbia, Vancouver, B.C., Canada
John Byl
Affiliation:
Department of Geophysics and Astronomy, University of British Columbia, Vancouver, B.C., Canada

Abstract

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Integrating backwards in time in the circular restricted three-body problem Galaxy-Sun-Comet, for both the real long-period comets and fictitious random sets of orbital elements, we have confirmed van Flandern’s conclusion that there is a statistically-significant clustering of the orbits of real long-period comets, in heliocentric direction, some 5×106 years ago. The clustering is also significant in heliocentric distance, and is more marked if it is assumed that the comets have gone round the Sun more than once since the epoch of maximum clustering. We suggest that the “event” discovered by van Flandern is not the explosive disruption of a planet formerly in the asteroid belt, but the latest in a series of minor catastrophies, such as the collisional break-up of a pair of large asteroids.

Type
Part I. Planetary Theory and Analytical Methods
Information
International Astronomical Union Colloquium , Volume 41: Dynamics of Planets and Satellites and Theories of their Motion , 1978 , pp. 101 - 107
Copyright
Copyright © Reidel 1978

References

1. Ovenden, M.W., Vistas in Astronomy 18, 473, 1975.Google Scholar
2. Ovenden, M.W., Recent Advances in Dynamical Astronomy, ed. Tapley, B.D.and Szebehely, V.(Dordrecht: Reidel) p. 319, 1973.Google Scholar
3. Ovenden, M.W., Long-time Predictions in Dynamics, ed. Szebehely, V. and Tapley, B.D. (Dordrecht: Reidel) p. 295, 1976.Google Scholar
4. van Flandern, T.C. Private Communication, 1976.Google Scholar
5. van Flandern, T.C. Communication to I.A.U.Colloquium #41.Google Scholar
6. Schmidt, M., in Galactic Structure, ed. Kuiper, G.P. and Middlehurst, B.M. (Chicago: University of Chicago Press) p. 513, 1965.Google Scholar
7. Ovenden, M.W. and Byl, J., Astrophys.J. 206, 57, 1976.Google Scholar
8. Marsden, B.G. and Sekaninan, Z., Astron.J. 78, 1118, 1973.Google Scholar