On 7/5/2013 21:55, Kevin Fetter wrote: > I had a pass of usa 186, with it predicted to pass above Altair. At the time > it passed, it passed below Altair, wrecking my view. i've run into similar things in the past... recently, while facing east, i noted ISS passing above (higher than aka more west of) a bright star that was in front of my east view... later, when i looked at several prediction programs with sky views, they all showed ISS passing below (lower than aka more east of) that bright star... yes, i set the programs so they were facing the same way i had been at the time of the sighting... if i had to determine how far off the difference was between reality and the prediction programs, i would have to say 1 to 3 finger widths at arms distance... if your fist at arms distance is 10 degrees, then we're looking at roughly 2 to 8 degrees difference (if i did my math right and using only the four fingers with the thumb tucked in)... the question is how to remedy these types of problems? -- NOTE: No off-list assistance is given without prior approval. Please keep mailing list traffic on the list unless private contact is specifically requested and granted. _______________________________________________ Seesat-l mailing list http://mailman.satobs.org/mailman/listinfo/seesat-l
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