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

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The number of the elapsed solar years multiplied by
the number of sidereal revolutions of the respective planets
in a Kalpa and divided by the number of Solar years in
a Kalpa gives the planetary positions at the end of the last
Solar year.
Comm. This is a simple rule of three. The plane-
tary positions so got, leaving out the integral numbers of
revolutions made which are not required, are called the
Dhruvakas of the respective planets for the ensuing solar
year. With respect to the apogee of the Sun and the aphelia
and nodes of the star—planets these Dhruvakas themselves
give their positions for the whole ensuing year, as their
motion is very very slow.
Verse 10. An alternative method of obtaining the
Dhruvaka of the Moon.
The Adhimāsa Sesha multiplied by 12 gives the posi-
tion of the Moon at the Commencement of the Solar year.
Comm. Since the position of the Sun is at the Zero-
point of the Zodiac at the Commencement of the solar year,
and since the Adhimāsa Sesha is the difference of the solar
and luni-Solar systems of reckoning, or what is the same,
the arc gained by the Moon over the Sun, which is no
other than the elongation of the Moon measured in Tithis
each tithi being of 12° gain of elongation, so the Adhimāsa
Sesha at the Commencement of the solar year in Tithis
multiplied by 12 gives the longitude of the Moon at that
Commencement. (Note - Bhaskara waxes into poetic
eloquence in the second half of the verse, having given the
procedure in the first half).
Verse 11. Procedure prescribed in the event of com-
puting planetary positions from the beginning of the
Kaliyuga for the sake of convenience.