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Re: ? ? ? Re: Old style lunar
From: Bruce Stark
Date: 2004 Dec 10, 16:57 EST
From: Bruce Stark
Date: 2004 Dec 10, 16:57 EST
Alex,
You wrote: "Just send 1 (one) page which does not have to be
'dug out'. No matter which, for October 1800, or so."
One page wouldn't do. The old almanac has divided into months, twelve pages per month. Data for a given day is in different places. The copy of Oct. 1800 fit into a regular business envelope, and is in the mailbox now.
Here are some things you probably already know but I'll mention anyway:
Positions of Jupiter's satellites are given for mean time. Everything else is for apparent time.
The dates and hours are in astronomical time, which begins at noon and runs up to 24 hours. The date of noon is the same for civil, nautical, and astronomical time. But this same noon is the end of the sea day, the middle of the civil day, and the beginning of the astronomical day.
Ecliptic longitude columns are headed: "S. D. M. S." The first "S" stands for signs of 30 degrees. The rest, of course, is degrees, minutes, and seconds of arc.
If you, or anyone else, would like copies of other parts of the Almanacs to work with, please let me know.
Bruce
You wrote: "Just send 1 (one) page which does not have to be
'dug out'. No matter which, for October 1800, or so."
One page wouldn't do. The old almanac has divided into months, twelve pages per month. Data for a given day is in different places. The copy of Oct. 1800 fit into a regular business envelope, and is in the mailbox now.
Here are some things you probably already know but I'll mention anyway:
Positions of Jupiter's satellites are given for mean time. Everything else is for apparent time.
The dates and hours are in astronomical time, which begins at noon and runs up to 24 hours. The date of noon is the same for civil, nautical, and astronomical time. But this same noon is the end of the sea day, the middle of the civil day, and the beginning of the astronomical day.
Ecliptic longitude columns are headed: "S. D. M. S." The first "S" stands for signs of 30 degrees. The rest, of course, is degrees, minutes, and seconds of arc.
If you, or anyone else, would like copies of other parts of the Almanacs to work with, please let me know.
Bruce
