> It's hard to say (without writing a computer program to calculate it) precisely > what "after shadow" means, because of the earth's atmosphere. I'd certainly agree with that Tom. When trying to follow the station looking through an 8x50 finder scope its really difficult to pinpoint shadow entry. On a number of occasions I have tried to keep both eyes open , during the last stages of a pass , to try and judge when ISS is lost to the naked eye , but still vis in the finder. The best example I have is http://www.satcom.freeserve.co.uk/dec29long.jpg ...... Here , I would swear that I lost ISS naked eye about 15 seconds before it disappeared in the finder , but of course without accurate timings , I can't be certain. I suppose the way to check is to run a VRML programme to compare the attitude of the complex , as seen from the ground , as by shadow entry the station appears to have "flipped " over. Last night's Saturn transit/occultation was a complete wash out , 8/8 cloud all day and through the night...... :O( Regards, John. ------------------------------------------------------------------------- Subscribe/Unsubscribe info, Frequently Asked Questions, SeeSat-L archive: http://www.satobs.org/seesat/seesatindex.html
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