सिद्धान्तशिरोमणि: गणिताध्याय (भास्कराचार्य - ग्रहगणित, मध्यमाधिकार व स्पष्टाधिकार सटीक)

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12 to give in degrees the increase of Moon's longitude from
the ending moment of the tithi on the previous day. Thus
this increase is R/C × 12 ; but C = 1577916450000
∴ R/C × 12 = R / (1577916450000 / 12) = R / 131490000000
approximately.
Thus this increase is to be added to (x + 12 y)° where
x° is the longitude of the Sun and y the integral part of
the elapsed tithis so that the Moon's longitude is
(x + 12 y)° + R° / 131490000000˙
Verses 6, 7. Computation of the positions of the Sun
and the Moon from the Adhimāsa-Sesha and Avama-Sesha.
The Avama-Sesha divided by 27110000000 is termed an
additive constant in minutes of arc to the Sun’s position ;
the same Avama-Sesha multiplied by 13 and divided by 35
is termed such an additive constant to the position of the
Moon ; Construe that the Sun's position is given by as
many degrees as there are elapsed tithis after the beginning
of Chaitra and that the Moon's position is given by Thir-
teen times the same. Let these positions of the Sun and
the Moon be diminished by a number of degrees equal to
what is obtained by dividing the Adhimāsa-Sesha by the
number of lunations in a Kalpa. Then add the respective
additive constants to the positions of the Sun and the Moon
so obtained. The results will be the positions of the Mean
Sun and the Mean Moon.
Comm. Here the data are the Adhimāsa-Sesha and
the Avama-Sesha and nothing else and the problem set is
to find the Mean positions of the Sun and Moon. The
Adhimāsa-Sesha is of the form (R' × 30) / S where R' is the
remainder obtained while finding the elapsed Adhimāsas