Editorial standards and sources

Every guide, reference page and calculator on plutto.space is written and edited by the Plutto team at Xooteq Lab, with AI assistance, and checked against the classical source of the tradition it describes. The astronomy is computed, never estimated; the interpretations are the traditions’ own; and nothing here is presented as science or as advice.

What we stand behind

The positions are exact: they come from Swiss Ephemeris, the same astronomical library professional astrology software is built on. The calculators show their working, so any result can be checked by hand.

The meanings are the traditions’ own, stated as what the tradition holds — “Vedic astrology reads the Moon’s nakshatra as…”, not “you are…”. Where traditions disagree, we say so and name both.

What we do not claim

Astrology is not a science, and Plutto does not claim to predict the future. No page gives medical, legal or financial advice. We publish no ratings, review counts or user numbers until there are real ones to publish.

How AI is used

Readings inside the app are generated by AI language models from your computed chart: the positions are calculated first, and the model interprets them within the tradition you choose. The spoken voice is AI as well. The pages on this site are drafted with AI assistance, then edited and checked against the sources below.

Sources

Astronomy

Swiss Ephemeris (Astrodienst), for every planetary position, house cusp and ayanamsa. Vedic charts use the Lahiri ayanamsa; KP the Krishnamurti ayanamsa with Placidus cusps; Western charts the tropical zodiac with Placidus houses.

Vedic astrology (Jyotish)

Brihat Parashara Hora Shastra for the grahas, nakshatras, the Vimshottari dasha and the vargas; Phaladeepika and Saravali for yogas and interpretation.

KP astrology

K. S. Krishnamurti’s KP Readers, for the sub-lord theory, the 249 divisions and horary by number.

Western astrology

Ptolemy’s Tetrabiblos for the signs, rulerships and dignities, read beside the modern psychological tradition.

Chinese astrology (BaZi)

The Zi Ping method (Yuan Hai Zi Ping) for the Four Pillars, with the solar-term calendar, so the year turns at Li Chun rather than on 1 January.

Numerology

Pythagorean letter values for the life path and name numbers; Cheiro’s Chaldean table for Chaldean name numbers; Ank Jyotish for the Indian moolank and bhagyank.

Kundli matching

The classical Ashtakoota tables as the standard references publish them (Drik Panchang’s Ashtakuta tutorials and the widely reproduced koota tables) — every table is printed on the calculator’s page, with the choices where schools differ.

Sky calendar and Sade Sati

Retrograde stations, eclipses, sign ingresses and Saturn’s movements for Sade Sati are generated with Swiss Ephemeris itself (scripts/ephemeris.py), sidereal positions exactly as the app computes them — Lahiri ayanamsa, Rahu as the true node, with the mean node shown beside it.

The calculators

The Moon sign and Chinese zodiac calculators compute in your browser with astronomy-engine (MIT licence), using the Lahiri ayanamsa and ΔT of Swiss Ephemeris itself; tested against Swiss Ephemeris on 5,000 random moments from 1900 to 2100, the Moon agreed within 4.2 arcseconds. Birth times are converted with the IANA time-zone history your browser ships. The sign-ingress and Li Chun times on the reference pages are computed the same way.

Corrections

Found a mistake — a wrong degree, a misattributed meaning, a calculation that disagrees with yours? Write to support@plutto.space with the page and what you found. We fix factual errors and update the page’s date.

Last reviewed 28 September 2026.

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