Made a bad basic mistake in my search for that dusk flash . Because there were only 4 stars visible I drew a line between Altair & Arcturus , and the flash was right at that midpoint , but around 10 degrees below that line toward the horizon . So , that's what I did in Satflare in it's Skychart , as I described in that post (see - Any idea which of these objects I may have seen) . However , you cannot draw a straight line at that elevation (49 degrees for Altair & 35 for Arcturus) in a Skychart . The line between those 2 points obviously must be curved downward . My question is ... how curved ? Is there an app that would allow me to select 2 points or 2 stars in a skychart and then it would draw the proper curved line that would represent the straight line that I drew in that light sky ? If not , is there a workaround approach to picking a midway point that would be at the proper elevation (not the improper elevation that I initially assumed ) ? Sept 07 2012 00:20:30 UTC 43.20543 -79.26001 95M Elev Cheers & thanks in advance , gc -------------- next part -------------- An HTML attachment was scrubbed... URL: http://mailman.satobs.org/mailman/private/seesat-l/attachments/20120908/dd9c3363/attachment.html _______________________________________________ Seesat-l mailing list http://mailman.satobs.org/mailman/listinfo/seesat-l
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