सिद्धान्तदर्पण (महामहोपाध्याय सामन्त चन्द्रशेखर सिंह - नग्न-नेत्र खगोल वेध एवं गणित महाकोश)

Introduction xliii
Liberation Theory Annual Rate
Aryashta Satika
(quoted by Munisvara) 46″.25
Manjula (quoted by Bhaskara)¹ 59″.9
Bhasvati 60″
Grahalaghava 60″
The derangement of the equinox from the intial
point is 27° on either side according to the
Surya-Siddhanta, and this limit was probably
accepted by other libration theorists.
Aryashta-Satika, however, gives the limit of 24°
instead of 27' (Colebrooke).
We are not concerned here with the theories or
the limits of libration. Surya-Siddhanta and the
works based upon it, are now almost universally
adopted throughout India for computing an
almanac, though in some places Grahalaghava
occupies the field. Now from the first, we find the
ayanamsa for the first day of Saka 1816² (13th April
1894) was 20° 55′, and from the second, 22°50′ for
the same day. These amounts represent. the
minimum and maximum ayanamsa obtained from
Siddhanta rules.
Both the Surya-Siddhanta and Siddhanta-

1. Bhaskara did not believe in the liberation theory. For, as
   has been shown by Chandrasekhara (VI.100), he has
   directed us always to add the ayanamsa and never to
   subtract it.
2. In common parlanac, we speak of the year being Saka
   1816, though in reality we ought to say the first day of
   Saka 1817. The facts herein discussed were collected
   sometime ago, and as it immaterial which year is taken
   for illustration, they are not altered to suit the current
   year.