From: jrs@merlyn.demon.co.uk   
      
   JRS:  In article <1116765254.914901.266740@g43g2000cwa.googlegroups.com>   
   , dated Sun, 22 May 2005 05:34:14, seen in news:sci.space.science,   
   Cray74@gmail.com  posted :   
   >   
   >I'm interested in finding out if there's any use escaping Mars' gravity   
   >from Deimos by using a perigee burn low over Mars, or if it'd just be   
   >better to make a direct launch from Deimos to escape velocity without   
   >the perigee burn.   
      
   That would easy enough to determine given an expression for the delta-   
   vee needed to get from a given circular orbit to a given tangent   
   elliptical one, barring details.   
      
   It *may* be that the method always gives a saving but that starting from   
   low enough (Phobos?) it's just not worth bothering with.   
      
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