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Chapter 2 gives an example for using this table for July 17, 1447, that is, 198 days after the beginning of the year.

Table 4. Mean motion of the Sun and the lunar node in years

Na, f. 15v: Tabula solis et capitis draconis Nu, f. 30r: Tabula veri motus capitis draconis

Va, f. 186v: Tabula motus [symbol for the Sun] et [symbol for the ascending node] draconis Ed. 1495, f. a7r: Tabula solis et capitis draconis in medijs motibus Ed. 1526, f. 7r: Tabula [symbol for the Sun] et [symbol for the ascending node] draconis in mediis motibus

This table has three columns: see Table 4. The first displays the argument (in years, in descending order, from 1000y to 100y at intervals of 100y, from 100y to 20y at intervals of 10y, and from 20y to 1y at intervals of 1y). The second column displays the mean motion of the Sun (in physical signs, degrees, minutes, and seconds), and the third displays the mean motion of the lunar ascending node (in physical signs, degrees, minutes, and seconds). The entries for 1000y correspond to daily mean motions of 0;59,8,19,37,19°/d and -0;3,10,38,7,14°/d, respectively. As expected, these are the standard parameters used in the Alfonsine corpus.

Regiomontanus's copy has no column for the solar mean motion, and the entries for the mean motion of the lunar node are the complement in 360° of those in Table 4.

Table 4: Mean motion of the Sun and the lunar node in years (excerpt)

Years

Sun

Lunar node

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