Supastro Research: open data on Vedic astrology

We publish the numbers behind everyday Vedic astrology (Jyotish) in a form anyone can check. Every chart figure is computed with the same code the Supastro app runs: its own chart engine, the one behind its free tools, and the same rule functions behind its readings. Every rule is traced to the classical verse it comes from, with the text and verse number, and where no verse exists we say so. Pages with data offer it as a CSV file, free to reuse with credit.

How we compute

The same settings run through every page unless the page says otherwise.

• Sidereal zodiacPlanet positions are measured against the fixed stars, as Indian astrology does, not against the seasons as Western astrology does.
• Lahiri ayanamsaThe gap between the two zodiacs is the Lahiri (Chitrapaksha) value, as defined by India's Calendar Reform Committee: 23°15′00.658″ on 21 March 1956, carried forward by the precession of the equinoxes.
• Mean lunar nodeRahu and Ketu, the two points where the Moon's path crosses the Sun's, are placed at their mean (average) positions, the classical convention.
• Whole-sign housesEach house is one whole zodiac sign, starting with the sign rising at birth (the ascendant).
• Planetary periodsVimshottari dasha periods start from the Moon's position at birth, with a year of 365.2425 days.
• Rules traced to the verseEach rule names the classical text and verse it comes from, with a quote of at most 25 words. Where we found no verse, the page says it is a later custom.
• RepeatableEvery random sample uses a fixed seed and every "on this date" figure names its date, so the same numbers come out every time.
• No one's birth detailsThe chart datasets use generated birth moments or computed planet positions, never a person's own birth details.

Licence

Everything in Supastro Research, the tables, charts and CSV files, is published under Creative Commons Attribution 4.0 (CC BY 4.0). You may copy, share and adapt it for any purpose, including in commercial work, as long as you credit Supastro and link to the page you used.

How to cite

Each page ends with a “Cite this” box holding a ready-made reference and a one-line credit, each with a copy button. The pattern is: Supastro Research. (Year). Title. Page address. When you quote a figure, please give the page it comes from rather than this hub, so readers can check the method behind it.

Press and research questions

Journalists, writers and researchers can write to info@supastro.com. We can explain a method, point to the verse behind a rule, or give more detail on any figure published here.