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|    sci.space.science    |    Space and planetary science and related    |    1,217 messages    |
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|    Message 924 of 1,217    |
|    Henry Spencer to Cray74@gmail.com    |
|    Re: The planet that hit the earth to cre    |
|    26 May 05 16:34:57    |
   
   From: henry@spsystems.net   
      
   In article <1116968809.689468.294700@z14g2000cwz.googlegroups.com>,   
   Cray74@gmail.com wrote:   
   >> ...if I recall correctly -- it's been a while -- the hypothetical   
   >> "vulcanoids" within Mercury's orbit would be leftovers from the early days   
   >> of the solar system...   
   >   
   >How stable would be the orbits of "vulcanoids"? They're packed in close   
   >to several planets and the sun.   
      
   The Sun overwhelmingly dominates the situation. Perturbations from the   
   planets generally cause only small cyclic changes in orbital elements,   
   unless you happen to be in resonance with a planet. My recollection is   
   that a first look at the stability of vulcanoid orbits concluded that they   
   were reasonably stable over billions of years.   
   --   
   "Think outside the box -- the box isn't our friend." | Henry Spencer   
    -- George Herbert | henry@spsystems.net   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)   
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