Chapter on Mean Motions: The Laghumanasa

The precession of the equinoxes is six degrees and fifty minutes; furthermore, one minute is added for each subsequent year. The Sun, combined with this value, marks the beginning of the Northern Equinox.

The degrees of the precession of the equinoxes original: "ayanacalana" are 6° 50'. Again, one minute should be added to this for each passing year. This precession value must be added to the planet's true longitude to understand its true motion in the north and south directions. The Sun joined with this value is designated as the "Beginning of the Northern Equinox." This means that this specific value should be taken as the Sun's position at the vernal equinox. Since these constants original: "dhruva" - fixed starting points or epochs were established on a Saturday, the determination of the weekday for subsequent dates begins from the following Sunday. When there are many such constants, the total number of elapsed days term: "dyugana" - the count of days since an epoch is used to find the desired weekday by adding increments of one, two, etc. Now, for the sake of computational brevity, other constants are recorded here, based on those taught by the Teacher:

In the Shaka year measured by the Moon (1), the Gods (33), and the Moon (1) Shaka 1131, or 1209 CE, at the start of the month of Chaitra, on Sunday at noon:
The Sun's signs are 0, degrees are 11, and minutes are 18; the seconds are 44.
For the Moon, the values are 11, 26, and 55 respectively.
For the Moon's Apogee original: "candroccha", the values are 11, 0, and 22. Then, at the end of the Sun's revolution:
For Mars, the values are 10, 6, and 38. Then for Mercury original: "candraputra":
The values are 11, 22, and 0. For Jupiter, the values are 2, 24, and 33.
For Venus original: "bhrguputra", the values are 2, 16, and 53. Then for Saturn original: "suryatanaya":
The values are 0, 5, and 5?5. For Rahu the ascending lunar node, the values are 0, 15, and 59.

Here, the "Transit Tithis" lunar days associated with the Sun's entry into a sign are calculated using the mean position of the Sun. Because this set of constants is established for a Sunday, the determination of the weekday for calculations will proceed from the following Monday. Thus, having established the constants for a desired year, one should calculate the positions of the Sun and other planets using them. // 2 //

The number of years elapsed since the epoch should be multiplied by ten and increased by one-eighth of itself.
Add the Transit Tithis, then place the result below and subtract one-sixtieth of itself. // 3 //

Subtract the remainder left after dividing by thirty, and add the number of lunar days elapsed since the start of Chaitra.
Subtract the seasons passed in the current year multiplied by three; the result is the count of days from the epoch's weekday. // 4 //

Now he describes the method for calculating the total elapsed days dyugana: "From the epoch..." etc. In the year for which the constants were established, take the number of years that have passed since then. Multiply them by ten. Then, set that value down separately, divide it by eight, take only the whole number result, and add it to the first quantity. Then, add the "Transit Tithis" mentioned in the constants to that sum. Again, set this result down separately below...