Surya Siddhanta
रवीन्दुयोगलिप्ताभ्यो योगा भभोगभाजिताः । गता गम्याश् च षष्टिघ्न्यो भुक्तियोगाप्तनाडिकाः॥
The sum of the places of the Moon (found at a given time,) reduced to minutes, is to be divided by the Bha-bhoga (or 800′.) The quotient is the number of the elapsed Yogas (counted from Vishkarubha): (The remainder is called the Gata of the present Yoga, and the Bha-bhoga (or 800′) diminished by the gata is called the gamya of that yoga.) The gata and gamya of the present yoga multiplied by 60 and divided by the sum of the diurnal motions (of the Sun and Moon) become the numbers of the past and to be past ghaṭikás (respectively of the present Yoga at the given time.)
english translation
ravInduyogaliptAbhyo yogA bhabhogabhAjitAH । gatA gamyAz ca SaSTighnyo bhuktiyogAptanADikAH॥
hk transliteration by Sanscript