Earth-moon L5 Long-Term Stability Cray Tier 2 Member Posts: 1,672 Threads: 259 Joined: Apr 2013 04-09-2016, 03:57 AM I understand the basics of Lagrange points - L1 - L3 are unstable, L4 and L5 are stable if the two main bodies differ in mass by over a factor of 25 - but how stable are the Earth-moon L4 and L5 points on a period of millions of years, considering the other bodies in the solar system? Earth doesn't have an asteroid collection like Jupiter in its trojan points. Second, how stable is the situation if alien space bats pop a Vesta-mass asteroid into the Earth-moon L5 point? Mike Miller, Materials Engineer ---------------------- "Everbody's always in favor of saving Hitler's brain, but when you put it in the body of a great white shark, oh, suddenly you've gone too far." -- Professor Farnsworth, Futurama stevebowers Administrator Posts: 11,066 Threads: 438 Joined: Apr 2013 04-09-2016, 05:23 AM Earth does have at least one Earth/Sun Trojan asteroid, so it's not such a chaotic environment that trojans are forbidden. https://en.wikipedia.org/wiki/Earth_trojan I'd guess Earth/Moon Trojans would be stable for a relatively long time, but a large object might suffer a series of collisions in the long term if there were lots of other objects there. SteelySam Posting Member Posts: 1 Threads: 0 Joined: Sep 2016 09-11-2016, 04:41 PM (04-09-2016, 05:23 AM)stevebowers Wrote: Earth does have at least one Earth/Sun Trojan asteroid, so it's not such a chaotic environment that trojans are forbidden. https://en.wikipedia.org/wiki/Earth_trojan I'd guess Earth/Moon Trojans would be stable for a relatively long time, but a large object might suffer a series of collisions in the long term if there were lots of other objects there. What sort of effect could these collisions have? Drashner1 Administrator Posts: 15,754 Threads: 726 Joined: Sep 2012 09-16-2016, 01:59 PM (09-11-2016, 04:41 PM)SteelySam Wrote: (04-09-2016, 05:23 AM)stevebowers Wrote: Earth does have at least one Earth/Sun Trojan asteroid, so it's not such a chaotic environment that trojans are forbidden. https://en.wikipedia.org/wiki/Earth_trojan I'd guess Earth/Moon Trojans would be stable for a relatively long time, but a large object might suffer a series of collisions in the long term if there were lots of other objects there. What sort of effect could these collisions have? This post got hung up in our first post Moderation Queue and overlooked somehow, so...bump. Todd stevebowers Administrator Posts: 11,066 Threads: 438 Joined: Apr 2013 09-16-2016, 08:02 PM The debris of such a collision would mostly remain in the Lagrange point volume, and probably cause a risk in that volume so would need to be cleared up. Orbits around a Lagrange point can be quite large, so the debris could be quite sparse- but if secondary collisions occur then a Kessler Syndrome situation could develop. https://en.wikipedia.org/wiki/Kessler_syndrome In the early scenario I expect that scrap collectors would be employed to collect dead satellites and the results of such collisions; later, with the emergence of competent AI, such collisions would be rare unless they are caused with malicious intent. « Next Oldest | Next Newest »

Forum Jump:

Users browsing this thread: 1 Guest(s)