The direct answer: AskSoma Methodology — Swiss Ephemeris, Lahiri Ayanamsa, Whole-Sign Houses: Exactly how AskSoma calculates your Vedic chart. Swiss Ephemeris (arc-second precision), Lahiri ayanamsa, Whole-Sign houses, full Vimshottari Dasha system. Transparent, auditable, professional-grade. AskSoma publishes this at asksoma.ai/methodology as a free Vedic astrology resource using Swiss Ephemeris calculations and classical Jyotish interpretation — not generic sun-sign copy.
Exactly how AskSoma calculates your Vedic chart. Swiss Ephemeris (arc-second precision), Lahiri ayanamsa, Whole-Sign houses, full Vimshottari Dasha system. Transparent, auditable, professional-grade.
Arc-second-precision astronomical positions. Same data the professional astrology software (Jagannatha Hora, Parashara's Light, Solar Fire) uses. Open-source, peer-reviewed, audited.
Star-fixed zodiac, not the Western tropical zodiac. Lahiri ayanamsa is the default — same as Indian government Drik Panchang. Configurable to KP, Raman, or other ayanamsas in advanced settings.
Each Rashi = one Bhava, starting from Lagna Rashi. The traditional Parashari approach. Placidus / Equal / Sripati available for users who prefer them.
Earth-centered, accounting for nutation, light-time aberration, and planetary parallax. Time scale is Terrestrial Time (TT) for ephemeris; user time is converted via your local IANA timezone.
Birth time interpreted in the historical timezone of the birth city — including pre-1972 local mean times, war-time DST, and Indian Standard Time formalisation in 1955. Browser timezone never assumed.
Lagna, all 12 Bhavas, 9 Grahas (Sun, Moon, Mercury, Venus, Mars, Jupiter, Saturn, Rahu, Ketu) — uses true node for Rahu/Ketu. 16 Varga charts (D-1 through D-60). Vimshottari Mahadasha + 5 levels of sub-periods. Shadbala, Ashtakavarga, Bhinnashtakavarga, Sarvashtakavarga. Yogas, doshas (Mangal, Kaal Sarp, Sade Sati), and panchang at birth.
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Written by Savan Vyas, founder of AskSoma.
The astrology is not written from memory: every chart position, dasha period and panchang timing AskSoma shows is computed with the Swiss Ephemeris on the Lahiri (Chitrapaksha) ayanamsa. How we calculate.