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

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Comm. The mean Sun and the mean Moon are taken
to be in conjunction at the zero-point of the Zodiac. The
planetary positions given above are accepted by Bhaskara
on the authority of Brahmagupta. The fact that these
positions differ from those given by Aryabhata signifies
that Brahmagupta observed the True positions in his own
time and to obtain those positions by calculation, he must
have changed the fundamental constants such as the
number of civil days, and sidereal revolutions of planets
etc in a Kalpa. Here ends the section known as grahā-
nayana.