On the implausibility of a cometary origin for most Apollo-Amor asteroids

Details On the implausibility of a cometary origin for most Apollo-Amor asteroids On the implausibility of a cometary origin for most Apollo-Amor asteroids

Sep 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981icar...47..487l&link_type=abstract

(International Astronomical Union and American Astronomical Society, Colloquium on Comets: Gases, Ices, Grains, and Plasma, 61st

Astronomy and Astrophysics

Astronomy

8

Asteroids, Astronomical Models, Comet Nuclei, Cosmology, Life (Durability), Meteoritic Composition, Comets, Origin, Apollo Asteroids, Amor Asteroids, Comet Nuclei, Observations, Theoretical Studies, Parent Bodies, Meteorites, Formation, Models, Cosmic Rays, Exposure Age, Comparisons, Composition, Source

Scientific paper

As the rate of replenishment of short-lived Apollo-Amor asteroids from the main belt seems to be insufficient to compensate for their losses, the idea was put forward that most of them are inactive cometary nuclei. However, the observational and theoretical evidence is inconclusive about whether it is possible to transform cometary nuclei into asteroid-like objects. There is good evidence that Apollo-Amor asteroids represent the last parent bodies of most, or even all, classes of meteorites. But meteorites cannot be formed within cometary nuclei having a constitution like Whipple's classical model, and alternative models seem to be unsatisfactory. Therefore, it is concluded that the cometary origin of most Apollo-Amor asteroids is implausible and they are genuine asteroids coming from the main belt. The process of their losses and replenishment must be studied further.

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