Stone Meteorites: Time of Fall and Origin

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Science  05 Jan 1968:
Vol. 159, Issue 3810, pp. 79-82
DOI: 10.1126/science.159.3810.79


The fact that twice as many chondritic meteorites are observed falling in the afternoon as in the morning is not believed to be primarily of social origin, but to be a dynamic effect. Monte Carlo calculations show that the observed afternoon excess is not compatible with a lunar or Apollo asteroidal origin. Compatibility appears to require a source having an aphelion near Jupiter, such as could be provided conceivably by the Hilda or Trojan families of asteroids, or by short-period comets.