Fate of Planetesimals. Ejection from Sol. Sys. Collision with planets Capture as satellites, or into resonant orbits (e.g., the Trojan asteroids) Fragmentation Preservation to today (however, not necessarily in “ pristine ” condition) comets asteroids meteors. Comets.
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Comets seen in 146, 1531, 1607, and 1682 are the same [also records for 66 and 451], with Porb= 75 yrs – Halley predicted its return in 1758
15 x 7 x 10 km