NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Halley's lunar knowledge.
From: Frank Reed
Date: 2007 Dec 02, 23:02 -0500
From: Frank Reed
Date: 2007 Dec 02, 23:02 -0500
Michael Daly, you wrote (to George): "Exactly how is what I wrote contrary to what you write? There was no Nautical Almanac of reduced lunar data but there was raw data on lunar position. That's what I wrote and that's what you wrote." It's a minor distinction, but you wrote that there were NO ephemerides, or at least that's what you appeared to be saying. George pointed out that there WERE ephemerides which were not as good as the later N.A. but still of some limited use for determining approximate longitudes. The existence of further raw data is of some interest but probably not for Halley's observations c.1700 (he had not yet accumulated enough data to make any difference by that date). -FER www.HistoricalAtlas.com/lunars --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to NavList@fer3.com To , send email to NavList-@fer3.com -~----------~----~----~----~------~----~------~--~---