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Re: Tycho Brahe Mars oppositions
From: Omar Reis
Date: 2004 Dec 2, 11:35 -0200
From: Omar Reis
Date: 2004 Dec 2, 11:35 -0200
>Frank R wrote: >Calculations of future values of DT are simply best guesses. That's one reason why nautical almanacs aren't published decades in advances. I wonder why can't this value be deterministic, like everything else in astronomy ? I mean, the earth rotation is slowing down, as much as a second per year. But why is this amount variable and umpredictable ? Omar ----- Original Message ----- From: Frank Reed To: NAVIGATION-L@LISTSERV.WEBKAHUNA.COM Sent: Wednesday, December 01, 2004 4:06 AM Subject: Re: Tycho Brahe Mars oppositions Omar R wrote: "The DT is a problem value to me. I found that J. Meeus Astronomical Algorithms DT methods are diverging from true values after just 20 years of the book publication. How did you calculate the DT ?"