Jataka Tattva · by Mahadeva
Chapter 17 · Planet Periods
दशातत्वम्
जन्माङ्गचन्द्रान्यतरतश्चारवशेनोपचयगो ग्रहश्चेन्मित्रोच्चमूलत्रिकोणाश्रितोऽष्टवर्गजं शुभं पूर्णमशुभं स्वल्पं दिशति, अन्यथा नेष्टं पूर्णं शुभं स्वल्पं, तत्रापि तारतम्यात् कथनीयम् ।
Say a planet, by its transit, is in an upachaya (growth house). Count from the birth lagna (rising sign) or the birth Moon. And say it is in a friend's sign, its uchcha (high point) or its mulatrikona (a planet's strong own-sign part). Then it gives the good results of the ashtakavarga (eight-source point table) in full. It gives the bad only a little. Otherwise the bad is full and the good only a little. Even then, judge it by degree, more or less.
चन्द्राधिष्ठितो राशिर्जन्मनि यद्भावगस्तद्भावोत्थं शुभमशुभं वा ज्ञेयम् ।
In the birth chart, take the sign the Moon holds [at the start of the dasha (planet period)]. Find which house of the birth chart that sign falls…
रिपुयुक्पापस्य पापदशान्तरे विपत् ।
Say a bad planet is joined with an enemy planet. In that bad planet's dasha (planet period) or sub-period, disaster comes.
विपत्कर्तृदशारंभे सर्वाधिकबलः कोऽपि सद्वर्गगः शुभमितदृष्टश्चेन्न विपत् ।
Say a dasha (planet period) would bring disaster. At its start, say some planet has the most strength of all. Say it is in a good varga (division of…