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110
EPIGRAPHIA INDICA.
Thus the rules for finding the nakshatra by the Arya-Siddhanta are as follows:
A. Roughly. Find a, b, c and t in whole numbers; multiply e by 10; add 7226 to the result; from this subtract "equation c." The result is s, the sun's true longitude.
year.
B. More closely. Find a, b, c and t with the fractions in decimals; to the value of c multiplied by 10, or, with the decimal point one place to the right, add the constant 7226-3542; from the result deduct (including decimals) the amount of "equation c." The result is s in full detail. s+t=n, the index of the nakshatra, with which turn to Table LXVIII for value of the nakshatra.
The work is shewn in Example 7 below.
EXAMPLES.
Example 1. To find the a, b, c values for mean sunrise on the first civil day of the luni-solar
Rule. Add together the entries in Tables LXXII and LXXIII for the corresponding expired year of the Kaliyuga, and those in Table LXXIV for the number of days' interval from true Mesha-samkränti (Table LXI, col. 13, bracket-number) to the first civil day of the lunisolar year, called "Chaitra sukla 1" (col. 19, bracket-number). Note specially the week-day of Chaitra sukla 1, and work for that day. Decimals need not be used except in close cases.
For an example I take the year A.D. 1110-11. It corresponds (Table LXI) to K.Y. 4211 expired. The entries shew that true Mesha-samkranti occurred on Day 83 (Thursday, 24 March, A.D. 1110), and Chaitra sukla 1 on Day 82, the day previous. Interval between them 1 day.
Full work with the decimals:
(Table LXXII) Beginning of K.Y. cent. 42
.
(Table LXXIII) Beginning of year 11.
·
(Table LXXIV) Interval of days, 1.
At mean sunrise on Day 82, or on (4) Wednesday, 23 March, A.D.
1110.
[VOL. XVI.
w.-d.
(0)
(0)
(4)
a.
b.
384-5799 662-5608 282-0784
622.8697 819-7442
0.4230
8984-1044 891-1251 991-7866
(4) 9991-5540 373-4301 274-2880 These are the entries for that day in Table LXI.
The same result can be obtained by first finding the a, b, c for mean sunrise of the day on which true Mosha-samkranti, took place, and then deducting the values for the intervening
1 Owing to the formation of the several Tables the interval of days measured by their bracket-numbers in Table LXI, cols. 13, 19, sometimes differs by 1, but never by more than 1. But this leads to no difficulty when the desired week-day is duly noted. The point to remember is that the resulting week-day in our addition must be the correct one as given in Table LXI, and that we must use the entries in Table LXXIV for such number of days as will make the final week-day the one we work for.
