significantly different predictions by different programs

From: Ed Cannon (edcannonsat@yahoo.com)
Date: Mon Oct 30 2006 - 15:13:06 EST

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    It has come to my attention that among the programs being used for 
    predictions, there are some significantly differing results for 
    at least some objects.  A specific case is ETS 6 (94-56A, 23230).  
    
    Orbitron and Heavensat gave predictions that were something like
    one hour of RA different from what Highfly predicted, which is 
    certainly enough to cause an observer to miss an observation.  
    I've never used the first two programs but, with all due respect 
    to all the programmers and program users, if there's a significant 
    difference from what Highfly predicts, I believe Highfly.  
    
    My point is that perhaps people who are qualified to do so might
    compare the program predictions against observations and/or also
    the prediction models used, in order to determine what is the 
    origin of such significant differences in predictions and which 
    predictions are most accurate.
    
    Ed Cannon - Austin, Texas, USA
    
    
    
     
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