The Accuracy of Oppolzers Eclipse Maps
Rigge, William F., S.J.
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First Paragraph: There is a very general misconception of the accuracy of Oppolzer’s eclipse maps. This astronomer, as is well known, published in 1885 that immortal work entitled "Canon der Finsternisse,” which gives the numerical data for 8000 solar and 5200 lunar eclipses occurring between the years 1207 B.C. and 2161 A.D. The central lines of all the solar eclipses that fall north of 30° south latitude are plotted on 160 charts. It is these charts that give the book its greatest practical value, because they show in a graphic way and almost at a glance, whether and when and how often a total eclipse is visible in a given locality.