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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Frank: welcome back (and questions)
From: Alexandre Eremenko
Date: 2012 Mar 28, 00:27 -0400
From: Alexandre Eremenko
Date: 2012 Mar 28, 00:27 -0400
Frank, Thanks for your prompt reply. > Regarding the month listing in the archive, does it matter?? Easier to search. > My lunars tools are not set up for BC dates for obvious reasons, What obvious reasons? If the reasons are only the problem of input of a BC date online, will it work for 2-nd century AD? I mean the Almanac first of all. Can it be used to check Ptolemy observations (2-nd AD)? If not, how far in the past it is reliable? > but if you want high quality ephemeris data for > early periods, > I highly recommend Solex: http://chemistry.unina.it/~alvitagl/solex/ Thanks for the ref. Alex. P.S. There was an interesting but long discussion on our observations with Bill on lake Mich which were all 10' less than computed. We did not come to a consensus on this. There is a resume under the title "Trying to summarize: Extremely poor conditions..."
