History & development
Vargas are divisional classifications within Indian horoscope practice. The received Parashari corpus describes a sixteen-division scheme, while commentators and practitioners differ over some constructions. A declared method identifies the implemented reading of those rules; it does not establish one unchanged ancient software standard.
Mythology & symbolic world
Numerical names identify divisions of a sign. Associated life topics and divine names belong to religious and interpretive traditions. They are distinct from the measured source longitude and from the software convention used to display a mapped coordinate.
Provenance: where the rules come from
The Divisional charts workspace derives D1, D2, D3, D4, D7, D9, D10, D12, D16, D20, D24, D27, D30, D40, D45 and D60 from the same selected sidereal natal frame. It identifies the source segment, assigned sign and mapping method for each graha and Lagna. Equal-segment degrees are explicitly constructed display coordinates; unequal D30 is sign-only. The separate Navamsa workspace retains its existing D1–D9 chart, ruler, same-sign and sign-aspect controls. Optional sensitivity compares independently calculated charts at the recorded UTC time and two chosen time offsets without changing the birth profile.
How it is calculated
Choices that change the result: Choose D1, D2, D3, D4, D7, D9, D10, D12, D16, D20, D24, D27, D30, D40, D45 or D60; one of six detailed sidereal references; true or mean nodes; a graha or Lagna. The optional three-sample birth-time comparison uses ±1, ±2, ±5 or ±10 UTC minutes. Fagan-Bradley and De Luce remain comparison references. The dedicated Navamsa workspace remains available with its existing optional outer-planet comparison.
Inspect your calculated data →Uses & use cases
- Select a division and a graha to inspect the source longitude, segment and assigned sign.
- Compare the same graha in D1 and the selected division while retaining its natal house and ruler context.
- Distinguish the two-sign Hora, trinal Drekkana, forward D24 and source-sign D60 conventions from alternative methods.
- Compare the recorded birth chart with two nearby UTC samples to identify changes in assigned signs or mapped Lagna.
- Retain the selected conventions and derivation evidence in a downloadable record.
Interpretation methods
Trace one assignment
Read the source D1 position and the selected segment, then inspect the assigned sign and its ruler. The rule explains the mapping; the selected topic and original reflection guide a separate interpretive question.
Read D2 and D30 within their actual scope
D2 presents Sun/Moon ownership as the conventional Cancer/Leo chart. D30 assigns five unequal source portions to signs and omits mapped degrees. Keep these special constructions visible before transferring a rule from another varga.
D30 changes sign at its stated unequal boundaries, rather than advancing through thirty equal one-degree bins. This view therefore cannot supply a D30 degree orb.
Read derived houses without inventing a new horizon
Count whole signs from the mapped Lagna and retain D1 context. This is an interpretive arrangement of derived signs. The dedicated D9 view continues to show its stated classical sign-pattern aspects.
Interpret a three-sample sensitivity comparison
Compare the recorded chart with independently calculated UTC endpoint charts using the same reference, node setting and divisional rule. Identify which rows change and keep the size of the tested offset visible.
Matching placements at birth and at ±2 minutes show agreement at three instants. They do not prove that nothing changes between those instants or that the recorded birth time is correct.
Concepts in this tradition
Follow a term for its definition, word origin, evidence and connected ideas.
Disagreements & limits
- This is a declared sixteen-varga baseline; alternate Hora, Drekkana, D24 and other mapping variants are not selectable.
- D30 mapped degrees are intentionally absent. Equal-varga display degrees do not represent a new observed sky.
- Whole-sign divisional houses and sign rulers do not supply full dignity, strength, Vimsopaka scoring or an integrated divisional forecast.
- D60 sign assignment starts from the source sign in both parities. A reversed sixty-name sequence in even signs is a separate, unimplemented layer.
- The sensitivity tool compares three UTC instants only. It does not scan an interval, infer birth-time accuracy or perform rectification.
- Fine divisions can be sensitive to source positions and birth time; a precise display is not evidence of precise birth data.
Sources & evidence
Practitioner sources describe their own systems. Historical and astronomical sources support different kinds of claims. Reading exercises are editorial teaching examples.
- P. V. R. Narasimha Rao: Vedic Astrology, an Integrated Approach, §§6.2.1–6.2.20 ↗original practitioner textbook
- Vedic Astrology classes, volume 1 — P. V. R. Narasimha Rao; compiled class notes ↗original practitioner teaching
- Komilla Sutton and Connie Achilles: Vargottama ↗practitioner primary
- Sri Jagannath Center: Navamsha–Dharmamsha, Atri class ↗lineage teaching
- Brihat Parashara Hora Shastra, chapter 6, Sanskrit with R. Santhanam translation/commentary, printed pp.68–83 ↗classical Sanskrit text with modern translation and commentary
- P. V. R. Narasimha Rao: Personal Finances from Hora Chart (2003), pp.1–3 ↗original practitioner conference handout
- P. V. R. Narasimha Rao: Correct Siddhamsa Chart of Parasara (2012), pp.1–2 ↗original practitioner method proposal
- Shri Jyoti Star 10 official help: Varga chart variations ↗first-party professional software documentation