5 18;51


3, 6;58

4, 0;19

5, 6;21**

The entry for 1y, 7d 0;48h, means that in a year of 365 days 5;49,16h there is an integer number of anomalistic months plus 7d 0;48h and, indeed, 7d 0;48h = 365d 5;49,16h - (13 ■ 27d 13;18,36h). This entry differs from that for 1y given in Table 13, 6d 18;59h, which was the difference between a year of 365 days and the duration of 13 anomalistic months. The entries for the other four quantities (double elongation, mean lunar longitude, mean argument of lunar latitude, and longitude of the lunar node) have to be understood as the increments in these quantities between the beginning of the year and this precise moment (7d 0;48h before the completion of a year of 365d 5;49,16h).

Table 96. Mean motion of the lunar node in hours

Nu, f. 97r: Capitis in horis et fracciones Rc, f. 80r, no title

Ed. 1526, f. 390r: Motus [symbol for the ascending node] ad horas

This table has the same layout as Table 7 and it gives the mean motion of the Sun and the lunar node for a number of hours. In this case, the entries represent the difference between 360° and the mean motion of the lunar node for a number of hours (from 1h to 60h at intervals of 1h). Hence, the entry for 1h is 0;0° and that for 60h is 5,59;52°.

Excess of revolution for the planets in collected years: Tables 97 (Saturn), 98 (Jupiter), 99 (Mars), 100 (Venus), and 101 (Mercury)

Nu, f. 97v: In revolucionibus annorum collectorum Ed. 1526, f. 390v (Saturn: Tabula [symbol for Saturn] in revolutioni-bus annorum collectorum); f. 391r ( Jupiter); f. 391v (Mars); f. 392r (Venus); and f. 392v (Mercury)

In Regiomontanus's copy this information is displayed in a single table in contrast to ed. 1526 where it is presented in different tables, following the same pattern as that for the mean motion of the planets in collected years (Tables 21, 28, 35, 42, and 49). For each of the planets there are three columns: see Table 97. The first is for the argument: collected years from 40 to 2000 at intervals of 40y. The entries in the other columns represent the time (in days, hours, and minutes), with no specific heading, and the increment in longitude (superior planets)

or in anomaly (inferior planets), in physical signs, degrees, and minutes. Both these increments are here called motus and correspond to the number of collected years. The time displayed in column 2 is the excess over an integer number of periods of anomaly where the length of the year is 365d 5;49,16h.

Table 97: Mean motion of Saturn in collected years (excerpt)




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