Hayanaratna · by Balabhadra
Chapter 1 · Planets, Signs, Year Entry
ग्रहराशिस्वरूपवर्षप्रवेशाद्यानयनाधिकारः
अथ दशमलग्नानयनम् ॥युक्तायनांशार्कगतैष्यभागा लंकोदयघ्नाः खगुणोद्धृतास्तत् ॥स्याद्भुक्तभोग्यं तपनस्य जह्यात्पलीकृतात् प्रागपरान्नताच्चत् ॥
Now finding the 10th-house lagna (rising sign). Take the Sun with the ayanamsha (the zodiac shift) added. Take its degrees gone or to come. Multiply them by the Lanka rising. Divide by 30. That is the Sun's time passed or to go. Take it away from the eastern or western nata (time from midday or midnight), turned into palas (24-second units).
Simple meaning: Finding the 10th house: start from the Sun's time passed or to go in its sign, using equator rising times and the time from midday.
क्रमाद्गतैष्यानुदयांश्च शेषमशुद्धहृत्खाग्निगुणं लवाद्यम् ॥
10th, 7th and 4th houses: the 10th from the time from midday; add six signs to the rising sign for the 7th, and to the 10th for the 4th.
अथ पूर्वनतेपि धनलग्नानयनार्थं मदीयं वृत्तम् ।
Balabhadra's shortcut for the 10th house: with eastern time from midday, use the time from midnight and the Sun plus six signs.
अथ नतं विनैव लग्नादेव दशमलग्नसाधनमुक्तं विवाहवृन्दावने ॥
The 10th house from the rising sign alone: treat the rising sign as the Sun, find a new rising sign at half the night, then take six signs from both.