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Hayanaratna · by Balabhadra
Chapter 8 · Month Chart and Monthly Results
मासप्रवेशादिविचाराध्यायः
यद्वा ज्यां विनैवोदयान्तरानयनम् ॥सायनार्कपदे गम्यगतात्पांशा विवर्जिताः ॥द्विघ्नेन स्वशरांशेन विकलाश्चोदयान्तरे ॥
Or, finding the udayantara (rising-time correction) without the sine. In the quadrant of the sayana (tropical) Sun, take the degrees to come or gone. Reduce them by twice their own fifth part. The result is the seconds of the udayantara. (Our text is unclear here: the letters 'pamsha' after 'to come or gone' cannot be explained.)
Simple meaning: Rising-time correction without the sine: take the degrees gone or to come in the quadrant. Take away twice their fifth part; the rest is the correction in seconds.
अर्कमंदफलं खेन्दु १० गुणं स्याद्विकलात्मकम् ॥
Sun's time correction: the manda result times 10, read in seconds. It is plus or minus like the manda result.
१ | २ | ३ | ४ | ५ | ६ | ७ | ८ | ९ | १० | ११ | १२ | १३ | १४ | १५ | १६ | १७ | १८ | १९ | २० | २१ | २२ | २३ | २४ | २५ | २६ | २७ | २८ | २९ | ३०
Table of the mean Sun's motion for 1 to 30 days, in signs, degrees, minutes and seconds.
यदायनांशाढ्यरविर्मुखे स्याद्घटस्य मेषस्य च तत्र शंकोः ॥
Steps of the day-length change: the noon shadow of a 12-finger stick at the equinox is multiplied by 10, 8 and 10.