Earth Sciences 1086F/G Lecture Notes - Achondrite, Petrographic Microscope, Near Shoemaker

• School: Western University
• Department: Earth Sciences
• Course: Earth Sciences 1086F/G
• Professor: Bob Larose

Document Summary

Enormous mass has profound gravitational effect on bodies surrounding it: why the gaps: kirkwood gaps=jupiter"s orbit, but fractions. Where asteroids can escape the belt: classification: c-type, s-type e-type and m-type, carbon, silicate, metal with high albedo and metallic. Carbon 75% silicate 15: how do we get the composition: comparing albedo and spectrum (o dark, 1 reflecting, does the distribution of asteroid types match distribution of meteorite types collected on. Apollos: earth orbit crossing amor:mars crossing but not earth crossing: trojans: trap for small bodies, along jupiter"s orbit, phas: potentially hazardous asteroids, diameter>150m, less than 0. 5 au. Impact risk and the torino scale: impact risk assessing asteroids/comet impact predictions. 0 to 8-10 (certain collision), apophis: large asteroid of 4 to 0. No immediate danger of any asteroids in 21th century: asteroid exploration, eros and itokawa:near shoemaker softly landed and studied nea eros. Main belt mathilde flyby by near, with an interestingly low density.