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

opposition or conjunction as the case may be is called
Sparśa-Sthiti-Khaṇḍa.
(2) The time between the middle of the eclipse and
the moment of last contact is called the Mokṣa-Sthiti-
Khaṇḍa.
(3) The time between the commencement of total
eclipse and the middle of the eclipse is called the Sammi-
lana-Marda-Khaṇḍa.
(4) The time between the middle of the eclipse and
the end of total eclipse is called Unmilana-Marda-Khaṇḍa.
The suffix Khaṇḍa meaning ‘half’ is generally omit-
ted while refering to these phases. In the above verse
we are given formulae for Sthiti-Khaṇḍa and Marda-
Khaṇḍa only without specifying whether they pertain to
Sparśa or Mokṣa. Though the same formulae serve
for both the Sparśa phase as well as the Mokṣa phase
under the supposition that β does not vary, it will be
noted that the Sparśa-Sthiti-Khaṇḍa will not be equal to
Mokṣa-Sthiti-Khaṇḍa and that the Sparśa-Manda-
Khaṇḍa will not be equal to the Mokṣa-Marda Khaṇḍa
in as much as β changes from moment to moment.
In fig. 73, let C₁ be the position of the eclipsing body
at the moment of first contact and C₂ its position at the
moment of last contact. In the figure is shown only one
position of the Moon's disc signifying that we may con-
sider the motion of the eclipsing body keeping the eclipsed
body fixed (or what is the same relative to the position of
the eclipsed body). It is evident from the fig. that C₁M =
C₂M = P + r so that C₁M C₂ is an Isosceles triangle. Let
MN be the ⊥ᵃʳ dropped from M on C₁ C₂. C₁ C₂ is the
ecliptic because the centre of the shadow will be moving
along the ecliptic, for, in fig. 66, SE the ecliptic passes
through D the centre of the cross-section of the shadow-
cone, as well as through the vertex V of the shadow-cone.