About 1001 Yogas
1001 Yogas is a free reference and calculator for the yogas (planetary combinations) described in the classical texts of Vedic astrology.
What you'll find here
The site brings together 1001 yoga combinations drawn from works including Brihat Parashara Hora Shastra, Phala Deepika, Saravali, Sarvartha Chintamani, Jataka Parijata, Bhava Kutuhalam and Sambhu Hora Prakasha. Every yoga has its own page with its condition, its source where known, and its traditional results. The Yoga finder checks a birth chart against all of them at once.
How the calculations are done
Planet positions are computed in your browser from a model of the solar system fitted to NASA JPL's DE441 ephemeris. Checked against JPL Horizons, the Sun and planets agree to within 1 arc-second and the Moon to within about 12 arc-seconds for 1880 to 2120. Lahiri ayanamsa follows the Swiss Ephemeris definition. The chart uses the Lahiri (Chitrapaksha) ayanamsa, whole-sign houses counted from the Ascendant, mean lunar nodes and Parashari aspects. Each written condition was translated into a precise rule; where a text can be read more than one way, the most common classical reading is used.
Shadbala and Vimshottari dasha dates are matched to Jagannatha Hora.
Some conditions, such as a planet being "strong" or "weak", are judged with a simplified strength score based on sign dignity, house placement and aspects, rather than the full Shadbala method.
Who runs it
1001 Yogas is an independent project. Questions, corrections and suggestions are welcome. See the contact page.