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

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(c) shown in the figure) along the circle of intersection of
the Earth with a plane through CO' perpendicular to the
plane of the paper, where O₁ is a point on the earth such
that SĈO=90° the effect of parallax will be greater and
greater in latitude. In other words the parallax has both
an effect in longitude as well as in latitude. When it has
an effect in longitude only it is called Lambana, whereas,
when it has an effect in latitude, it is called Nati. (Thus the
translation of 'parallax' as Lambana alone is not fully
correct, though at times the parallax may have its com-
plete effect in longitude only or in latitude only). For the
observer who moves in the ecliptic plane only as the one
moving from O' towards O, the parallax will have its entire
effect in longitude only and for the observer moving in the
perpendicular plane from O' to O₁ mentioned before, the
parallax will have its entire effect in latitude only. For
observes other than the two above, it will have effect both
in longitude and latitude also. When parallax effects
longitude the time of conjunction is preponed or post-
poned, whereas when it effects latitude, the latitude of the
Moon appears to have increased or decreased. When it
increases, no eclipse occurs and when it decreases an
eclipse does occur. At O', the latitude will be exactly what
has been computed; at the point of intersection O'' of the
join of the centres of the Sun and Moon with the surface
of the Earth, parallax nullifies the latitude and on the great
circle O' O'' there will be parallax in latitude only effecting
the magnitude of the latitude.
It will be seen that for the point O'', the Sun and the
Moon are in the zenith, so that neither will suffer from
parallax. For the point O the Sun will be on the
horizon and the Moon being depressed below the horizon
though he is in geocentric conjunction the parallax in
longitude or lambana is maximum and the occurence of
the New Moon had already elapsed 4 nādis ago. Further