How does RishiAstro compute planetary positions?

Every position is evaluated server-side in RishiAstro's own astronomy engine. No third-party astrology API is called, and no positions are looked up from a precomputed table.

Which ayanamsa does RishiAstro use?

Lahiri (Chitrapaksha) is the default, the standard for Indian Vedic astrology. Raman, KP and True Chitra can be selected instead; the chosen value is applied consistently across the chart, dashas and yogas so the reading stays internally coherent.

Is RishiAstro's Gun Milan score accurate?

The Ashtakoot output follows classical Ashtakoot conventions. Remaining differences between schools come from koota conventions that genuinely vary between traditions — Nadi and Bhakoot exceptions in particular are applied differently by different schools.

Why do two sites give different Gun Milan scores?

Three reasons, in order of how often they matter: a different ayanamsa shifts the Moon's nakshatra near a boundary; the bride/groom order changes directional kootas such as Varna and Gana; and some schools cancel Nadi or Bhakoot dosha under conditions others do not. A score difference is usually a convention difference, not an arithmetic error.

Methodology

How RishiAstro calculates

Every position on this site is computed by RishiAstro's own astronomy engine, using the Lahiri ayanamsa by default. The Ashtakoot matchmaking output follows classical Ashtakoot conventions.

Where the planetary positions come from

Planetary and lunar positions are evaluated inside our own engine on our servers — not looked up from a third-party astrology API or a table of precomputed charts.

That is why an unusual birth date — a leap day, a pre-1900 year, a high-latitude birthplace — returns the same quality of result as a common one.

Sidereal zodiac and ayanamsa

Vedic astrology is sidereal: it measures from the fixed stars rather than the equinox, and the offset between the two is the ayanamsa. Which value you use shifts every position, so it is the single largest source of disagreement between astrology sites.

Lahiri (Chitrapaksha) — default. The standard for Indian Vedic astrology.
Raman, KP and True Chitra — selectable alternatives for readers who follow those schools.

Whichever you choose is applied consistently across the chart, divisional charts, dashas and yogas, so a reading is never a mixture of two systems.

Houses, charts and dashas

Houses are counted whole-sign from the Lagna — the classical Vedic convention, and the one the dosha and yoga logic assumes. Charts are rendered in North Indian (diamond, fixed houses), South Indian (square, fixed signs) and East Indian / Bengali (Surya Chakra, fixed signs anti-clockwise from Aries) styles from the same underlying data, along with the D9 Navamsa. Vimshottari, Yogini and Char dasha timelines are computed from the Moon's exact nakshatra position at birth.

How the matchmaking output is checked

Ashtakoot Gun Milan output follows classical Ashtakoot conventions.

Differences between schools are not arithmetic. They come from koota conventions that genuinely differ between traditions — Nadi and Bhakoot dosha in particular are cancelled under conditions some schools accept and others do not, and the bride/groom order changes the directional kootas (Varna, Gana). When two sites disagree on a 36-guna score, this is almost always why.

What this is not

The astronomy is deterministic and reproducible; the interpretation built on it is a traditional belief system, not a scientific claim. Readings here are for guidance and reflection, and are not a substitute for professional medical, legal, financial or psychological advice. See our Terms of Service.

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