Re: Mir seen at -0.8 degree?

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At 09:00 PM 12/28/96 -0800, you wrote:

>What has SKYMAP got to do with altitude? Altitude is observable
>directly. If an absurd result is attained in a computation then
>one usually assumes the computation (or the observation) is in
>error. Refraction will buy you, on the average, 0.5 degrees. Do
>you have a true or lower horizon? If you have a true horizon you
>cannot observe below an apparent altitude of zero.
Leigh , Ron is 2073m above sea level. If he could see a
sea level horizon(unlikely in Colorado) it would be depressed
some 80 arcminutes by geometry alone.
Tony Beresford

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