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

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are on the average 59'—8''+790'—35''=850', to cover
one Yoga, they take roughly one day since the duration
of a yoga is of 800'. To get the number of elapsed yogas,
divide (⊙+M)' where M is the longitude of the Moon by
(s+m). To get the elapsed nādīs which are given by the
remainder r' or the remaining nādīs of the current yoga
which are given by 800; the proportion is ‘If by s+m
gain in the sum of the longitudes we have 60 nādīs, what
time is indicated by r' or 800—r'?’. The answer is
(r' × 60)/(m + s) or ((800 — r)' × 60)/(m + s) = गतैष्यविलिप्तिकाः/(m + s) .
By the word गतैष्यविलिप्तिकाः is meant therefore the number
of seconds of arc as many as the remainder r or (800—r)
is in minutes or what is the same the remainder or 800—r
converted into seconds.
(8) The tithi, karaṇa, nakṣatra of the Moon and
yoga constitute four of the Angas of the panchānga or the
Hindu Calendar the fifth being the week-day. All these
five are supposed to have their effects good or bad on living
beings.
Verses 68, 69. The correction what is called Nata-
karma.
The Zenith distances of the Sun and the Moon at the
end of Purṇimā or Amāvāsyā at the time of lunar or solar
eclipse, being expressed in nādīs, are multiplied by 6 to get
the degrees. Let their H sine be got from the short table
of H sines. Multiply it by the equations of centre of the
Sun and the Moon. Divide by 4920, and 4361 respectively.
If the Sun be in the Eastern hemisphere, let the result
pertaining to the Sun be subtracted from his position ; if
in the Western, let it be added to his position. If the
Moon be in the Eastern hemisphere and if his equation
of centre be negative let the result be added to his position;
if the equation of centre be positive, let the result be sub-
tracted from his position in either of the hemispheres.