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

155
plained by this author in his work ‘A critical study of
Ancient Hindu Astronomy’ (published by the Karnatak
University) page 98.
Verse. Cited from Golādhyāya.
The equation of centre is to be applied to the mean
planet to obtain the centre of the Śīghraepicycle; then to
obtain the true position the Śīghraphala is to applied to the
Mandasphutagraha; hence the two equations are mutually
related so that the true position is obtained after repeated
application of the two equations.
Comm. Explained above.
Verse 36 latter half and 37. The true daily motion
of the planet is the excess of the longitude of the true planet
of the next day over that of the true planet of the previous
day.
The Kotiphala being multiplied by the daily motion of
the Manda mean anomaly and divided by the radius, and
the result being added to or subtracted from the mean
motion, gives what is called Mandasphutagati.
Comm. Already explained before. If M₁, M₂ and S be
the mean planet, Mandasphutagraha, and the true planet
respectively, and if E₁ and E₂ be respectively the two equa-
tions, then
M₁ + E₁ = M₂, M₂ + E₂ = S so that
δM₁ + δE₁ = δM₂ and δM₂ + SE₂ = δS
Here δM₁ = mean daily motion, δE₁ = daily variation
in the Mandaphala, δM₂ = daily motion of the Mandasphuta
graha or what is the same Mandasphutagati, δE₂ = daily
variation in the second equation and δS = True daily
motion.