Astrophysics and Space Science

, Volume 4, Issue 1, pp 84–102 | Cite as

Asteroidal jet streams

  • H. Alfvén


Detailed studies of the asteroidal belt are of importance for clarifying whether the asteroids are fragments of an exploded planet or represent an intermediate state in the accretion of planets.

A study of the Hirayama family Flora shows that it contains three groups of bodies travelling in almost identical orbits, thus constituting three jet streams.

It is shown that the formation of jet streams is difficult to reconcile with the exploded planet view.

In order to decide whether the formation of jet streams is a general phenomenon in the asteroidal belt, it is necessary to determine the orbits of a large number of small asteroids.


Intermediate State General Phenomenon Asteroidal Belt Small Asteroid Identical Orbit 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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  1. Alfvén, H.: 1954,On the Origin of the Solar System, Oxford University Press, Oxford.Google Scholar
  2. Alfvén, H.: 1967, ‘On the Origin of the Solar System’,Quart. J. Roy. Astron. Soc. 8, 215.Google Scholar
  3. Anders, E.: ‘Fragmentation of Asteroids’,Icarus 4, 399.Google Scholar
  4. Brouwer, D.: 1951, ‘Secular Variations of the Orbital Elements of Minor Planets’,Astron. J. 9, No. 1189.Google Scholar
  5. Brouwer, D. andClemence, G. M.: 1961,Celestial Mechanics, New York, p. 526.Google Scholar
  6. Kiang, T.: 1966, ‘Bias-Free Statistics of Orbital Elements of Asteroids’,Icarus 5, 437.Google Scholar
  7. Efemeridi Malich Planet 1968 (Minor Planets). Institute for Theoretical Astronomy, USSR Academija Nauk, Leningrad.Google Scholar
  8. Piotrowski, S.: 1953, ‘The Collision of Asteroids’,Acta Astron. (Krakow) 5, 139.Google Scholar

Copyright information

© D. Reidel Publishing Company 1969

Authors and Affiliations

  • H. Alfvén
    • 1
    • 2
  1. 1.Division of Plasma PhysicsRoyal Institute of TechnologyStockholmSweden
  2. 2.Dept. of Applied ElectrophysicsUniversity of CaliforniaSan Diego, La JollaU.S.A.

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