Orbital and temporal distributions of meteorites originating in the asteroid belt

Details Orbital and temporal distributions of meteorites originating in the asteroid belt Orbital and temporal distributions of meteorites originating in the asteroid belt

Sep 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998m%26ps...33..999m&link_type=abstract

Meteoritics & Planetary Science, vol. 33, no. 5, pp. 999-1016.

Computer Science

88

Scientific paper

The recent discovery of the importance of Sun--grazing phenomena dramatically changed our understanding of the dynamics of objects emerging from the asteroid belt via resonant phenomena. The typical lifetimes of such objects are now expected to be smaller than 10 Myr, demanding a reassessment of our general picture of the meteorite delivery process.By analysing direct numerical integrations of about 2000 test particles beginning in the v6, 3:1, and 5:2 resonance in the main belt, we have re-examined the orbital and temporal distribution of meteoroids which journey to Earth. Comparing the results with fireball data, we find that the orbital distribution of Earth-impacting chondrites is consistent with a steady-state injection of meteoroids into the 3:1 and v6 resonances. Since this is the most complete and unbiased data set concerning Earth-impacting meteoroids, the agreement leads us to believe that our model is accurate. The simulations predict a PM fall ratio for chondrites (14% lower than the observed value of (68%, arguing for a moderate bias being present in this statistic. Most interestingly, the typical meteorite transfer times predicted by our models are factors of several lower than the typical chondrite exposure ages, implying that these meteorites acquired most of their exposure in the main belt before entering the resonances. We discuss some processes that would allow such pre-exposure. The case of achondrites and iron meteorites is also briefly discussed.

Affiliated with

Also associated with

No associations

Rating

Orbital and temporal distributions of meteorites originating in the asteroid belt does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Orbital and temporal distributions of meteorites originating in the asteroid belt, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Orbital and temporal distributions of meteorites originating in the asteroid belt will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1711752