Gregorius XIII (Argoli 1)

Gregorius XIII (Argoli 1)

Andrea Argoli (1570–1657), born in Tagliacozzo, was a versatile Italian scholar. He was a jurist, mathematician, astronomer and astrologer, and medical writer. His father was Ottavio and his son, Giovanni.
He was professor of mathematics at the University of Rome La Sapienza, from 1622 to 1627, and then the University of Padua 1632 to 1657. His astrology pupils may have included Placido Titi, and Giambattista Zenno, astrologer to Wallenstein. Argoli studied in Naples but (he stated) without the help of a teacher. He also claimed to have studied privately in Padua with Giovanni Magini, teacher of mathematics and astronomy at the University of Bologna. Between 1622 and 1627 Argoli taught mathematics at the University La Sapienza in Rome. After Benedetto Castelli replaced him at the University La Sapienza, Argoli received support from Cardinal Biscia for 5 years. In 1632 Argoli was called to teach mathematics in Padua, where he taught until his death.
Argoli dedicated his ephemerides, published in 1623, to the Abbot of the Congregation of the Camaldolesi of Santa Mariå, another ephemerides, published in 1629, to Prince Filippo Colonnå.

De Diebus Criticis (DDC)

1)- GREGORIUS XIII

Pope Gregory XIII is best known for his reformation of the calendar, with the aid of Jesuit priest/astronomer Christopher Clavius, who is credited as the calendar's chief architect. The reason for the reform was that the average length of the year in the Julian calendar was too long - it treated each year as 365 days, 6 hours in length, whereas calculations showed that the actual mean length of a year is slightly less (365 days, 5 hours and 49 minutes) As a result, the date of the actual vernal equinox had slowly (over the course of 13 centuries) slipped to 10 March, while the computus (calculation) of the date of Easter still followed the traditional date of 21 March.

[Argoli, DDC, 146 ; Junctinus 671a]

• ASC LEO & VIRGO, ruler SU & ME (VI)
• MC TAURUS, ruler MA (X)
• mundane // JU, SA

Morinus gives MA as ALMUTEN.

- HYLEG : ASC
- ALCOCODEN : JU
- ANAERETA : SA (MA)

However, we note that MA is heavenly detriment (TAURUS), and to a higher degree MO (CAPRI).

- primary directions

We find 3 primary directions : SU opp JU (1585) [hyleg opposite alcocoden], ME [ruler of ASC opp MA] and MA opp ASC.

a)- ME opp MA : we find the arc by directing the MA opp. to conjunction of ME.

We find 1 DP Regio-Campa.

b)- SU opp JU ; idem par directing opp. JU to conjunction of SU

We find 2 DP Regio-Campa and 2 fictitious (Goldmayer Placidus).

c)- MA opp ASC

D= OA(MA) - OA(ASC) = |49.628-134.759| = 85.13°. (If we take the birth hour provided by Junctinus, 18h50, we find D = 82.58° closer to the age of death).