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

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longitudes of the Sun, Moon and Rāhu are respectively
3-2-28-12, 8-19-4-26 and 6-11-43-28 (in Rāśis, degrees
etc), taking mean motions into account. When the Moon
has the maximum southern declination in the position M₁
of fig. 129 his longitude will be however 8-10-9-35 and then
his declination will be 1169. At that moment the decli-
nation of the Sun will be 1398. Even here the Moon's
declination falls short of that of the Sun. Again after
13⅔ days, we find the declination of the Moon falling short
of that of the Sun. Even after 2 months, the Moon
cannot have a declination equalling that of the Sun.
This phenomenon occurs when Rāhu of the lunar orbit
happens to be at Libra, and the Sun is at the summer
solstice approximately.
Verse 8. The definitions of Vyatīpāta and Vaidhṛti.
When the Sun and the Moon are in opposite Ayanas,
but in the same Goḷa, and if then their declinations be
equal, then that moment is said to constitute vyatīpātayoga.
If on the other hand, if both the Sun and the Moon be in
the same Ayana and opposite Goḷas, and if then their
declinations be equal, that moment is said to constitute
Vaidhṛti Yoga.
Comm. Explained before.
Verse 9 and first half of verse 10. To prognosticate
the occurrence of a pāta.
When the sum of the tropical longitudes of the Sun
and the Moon happens to be 180° or 360°, then the Vyati-
pāta and the Vaidhṛti respectively will occur or will have
occured. The number of minutes of arc by which the sum
of the tropical longitudes falls short of or exceeds 180° or
360° as the case may be, are to be divided by the sum of the
true daily motions of the Sun and the Moon, which will
give aqproximately the number of days after which or