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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: venus
From: Frank Reed CT
Date: 2004 Oct 13, 03:00 EDT
From: Frank Reed CT
Date: 2004 Oct 13, 03:00 EDT
George H wrote:
"I get 16d 05.1'; Frank
calculates 16d 05.5'. So there's a discrepancy of 0.4' between us,
somewhere, in the process of allowing for semidiameter(s) and clearing the
lunar distance. Not an enormous divergence, and certainly much smaller than
the difference Michael Dorl observes with his measured distances. But
clearing the distance and allowing for semidiameter should be a rather
exact science, so I wonder why we disagree by that amount. It might be
enlightening to track it down."
Thanks for questioning this. It could easily be that I've got a sign wrong somewhere or something like that. I'll see what I can find. And thanks also to Fred H, Herbert P, and Michael D for posting their calculations which all seem to differ from mine. By the way, does anyone do oblateness the way Chauvenet does? That's how my calculator does it.
Frank R
[ ] Mystic, Connecticut
[X] Chicago, Illinois
"I get 16d 05.1'; Frank
calculates 16d 05.5'. So there's a discrepancy of 0.4' between us,
somewhere, in the process of allowing for semidiameter(s) and clearing the
lunar distance. Not an enormous divergence, and certainly much smaller than
the difference Michael Dorl observes with his measured distances. But
clearing the distance and allowing for semidiameter should be a rather
exact science, so I wonder why we disagree by that amount. It might be
enlightening to track it down."
Thanks for questioning this. It could easily be that I've got a sign wrong somewhere or something like that. I'll see what I can find. And thanks also to Fred H, Herbert P, and Michael D for posting their calculations which all seem to differ from mine. By the way, does anyone do oblateness the way Chauvenet does? That's how my calculator does it.
Frank R
[ ] Mystic, Connecticut
[X] Chicago, Illinois
