Technical Methodology · Full Transparency
The Math Behind
Your Kundli.
Other Vedic sites use old 1970s ephemeris tables rounded to 5-minute intervals. We use NASA's VSOP87 planetary theory — the same mathematics that spacecraft navigation relies on.
This page explains every calculation, every source, every classical reference. No black box.
Accuracy Stack
Planetary positions
VSOP87 theory (Bretagnon & Francou, 1988). Sub-arcsecond accuracy over ±4000 years.
Sidereal conversion
Lahiri ayanamsha as defined by Govt. of India Calendar Reform Committee (1955). Chitra-paksha aligned.
Ascendant calculation
Rigorous obliquity + equation-of-the-equinoxes corrections applied per IAU 2006/2000A model.
Divisional charts (D1–D60)
Classical Parashari division per BPHS Chapter 7. All 16 vargas supported.
Dasha systems
Vimshottari (primary), Yogini, Ashtottari, Kalachakra, Char — 5 systems.
Yoga detection
Pattern-match over 300+ classical yogas: Raj, Dhana, Parivartana, Pancha Mahapurusha, Neecha Bhanga.
Shadbala (planetary strength)
All 6 strengths computed per BPHS: Sthana, Dig, Kala, Chesta, Naisargika, Drik.
Ashtakavarga
Sarvashtakavarga + 7 planetary Ashtakavargas with Bindu reduction.
Classical References Cited
Every interpretive claim in your report is tagged with a classical source. This is unique — we are the only Vedic engine that shows you the citation.
- BPHSBrihat Parashara Hora Shastra — the foundational 71-chapter text of Vedic astrology, 4th century CE
- Jataka ParijataVaidyanatha Dikshita, 16th century — yoga and dasha refinement
- PhaladeepikaMantreswara, 14th century — planetary effects and timing
- SaravaliKalyana Verma, 10th century — 9-graha analysis + yogas
- Hora SaraPrithuyasas (son of Varahamihira) — predictive framework
- Sarvartha ChintamaniVenkatesha, 16th century — karma-focused prediction
- Uttara KalamritaKalidasa — karaka and varga methodology
- Jaimini SutrasSage Jaimini — alternate dasha systems (Char, Karaka)
Why Your Chart Differs Across Sites
If you've seen different Rashi, different Nakshatra, or different Dasha dates across astrology sites — this is why.
| Dimension | Jyotish Engine | Typical Indian Astro Sites |
|---|---|---|
| Planetary math | VSOP87 (sub-arcsecond) | Old ephemeris, 5-min rounded |
| Ayanamsha | Lahiri (Chitra-paksha) | Varies — sometimes KP |
| Time precision | Second-level | 5-minute grouping |
| Divisional charts | All 16 vargas (D1–D60) | Often only D1 + D9 |
| Yoga detection | 300+ patterns auto | Hand-picked, incomplete |
| Classical citation | Per prediction | None |
| Dasha systems | 5 systems | Vimshottari only |
| Open methodology | This page | Black box |
87-Module Engine · What We Actually Compute
Lagna + LagnadhipatiRasi Chart (D1)Navamsha (D9)Dashamsha (D10)Saptamsha (D7)Dwadashamsha (D12)Shashtiamsha (D60)Trimshamsha (D30)Hora (D2)Drekkana (D3)Chaturthamsha (D4)Shodashamsha (D16)Vimshamsha (D20)Chaturvimshamsha (D24)Bhamsha (D27)Khavedamsha (D40)Vimshottari DashaAntardashaPratyantardashaSookshma DashaYogini DashaAshtottari DashaKalachakra DashaChar DashaShadbala (6 strengths)Sthana BalaDig BalaKala BalaChesta BalaNaisargika BalaDrik BalaIshta KashtaAshtakavargaSarvashtakavargaBindu AnalysisTransit GocharMangal DoshaKaal Sarp DoshaNadi DoshaBhakoot DoshaGraha DoshaGuru ChandalShakat YogaRaj YogasDhana YogasPancha MahapurushaNeecha BhangaParivartana27 NakshatrasPadas (108)Nakshatra DashaRashi KarakaKarakas (AK–DK)ArgalaVirodhargalaGraha DrishtiRasi DrishtiSpecial DrishtiSaptamsha DrishtiBhrigu BinduPrashna KundliMuhurta AnalysisPanchang 5 limbsChoghadiyaRahu KaalGulika KaalYamagandaHora (planetary hour)Solar Return (Varshphal)Lunar ReturnTithi PraveshProgressionsPrasthara VakyaPindayuAmsayuNisargayuBhava ChalitChara KarakasUpagrahasDhuma/VyatipataFortune (Pars Fortunae)Mrityu BhagaVishti KaranaSade SatiShani DhaiyyaDhan YogaVipreet Raj Yoga
Now read your chart — with full math transparency.
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