Editing Talk:1740: Rosetta

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The effect of impact may be small, but it will be multiplied with time. It might easily be measurable next orbit, and possibly be enough to "save Earth" after 10 orbits. If the 67P would actually be on trajectory colliding with Earth in 10 orbits, obviously. -- [[User:Hkmaly|Hkmaly]] ([[User talk:Hkmaly|talk]]) 00:30, 2 October 2016 (UTC)
 
The effect of impact may be small, but it will be multiplied with time. It might easily be measurable next orbit, and possibly be enough to "save Earth" after 10 orbits. If the 67P would actually be on trajectory colliding with Earth in 10 orbits, obviously. -- [[User:Hkmaly|Hkmaly]] ([[User talk:Hkmaly|talk]]) 00:30, 2 October 2016 (UTC)
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:Let's see.  The impact was 2E-2m/sec and the masses are 3E6g and 1E13g, so delta V is 6E-9m/sec.  Ten orbits is 2E9sec, so the change in position would be 12m.  However, it might be in an orbit stabilized by Jupiter, or an in unstable orbit, in which case the change could be substantially different; impacts near aphelion or perihelion will also have nonproportional affects.  I would guess that it is on the order of the uncertainty of the position and orbit.[[User:Matchups|Matchups]] ([[User talk:Matchups|talk]]) 11:31, 3 October 2016 (UTC)
 

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