1. Birth inputs
Date, local time, latitude, longitude and timezone are normalized on the server. The saved birth data remains the source used across the chart, dashboard and timeline.
Calculation methodology
What happens between your birth details and your reading.
Anantrix separates astronomy, Vedic analysis and written interpretation. That makes it possible to explain what was calculated, reuse one chart consistently and state where the result becomes uncertain.
Calculation explanation updated 4 October 2026.
Calculation pipeline
2. Astronomical positions
The calculation engine derives planetary positions and applies the selected sidereal settings. Lahiri ayanamsha and whole-sign houses are the default for existing charts.
3. Vedic analysis
Chart rules derive houses, nakshatras, Yogas, doshas, Ashtakoota compatibility, Vimshottari periods and transit relationships from those positions.
4. Plain-language reading
A deterministic narrative layer converts the computed factors into direct, plain language. It uses the chart evidence already calculated rather than creating a different answer each time.
A Moon-sign calculation you can reproduce
This is a fictional example, not a customer's birth record. Enter 15 January 1990, 12:00 noon, London, United Kingdom in our free calculator. The local timezone is Europe/London. The result below is calculated with the same service and Lahiri sidereal setting as that tool.
- Calculation instant (UTC)
- 1990-01-15T12:00:00.000Z
- Moon sign, birth star and quarter
- Leo · Purva Phalguni · pada 4
- With the birth time marked unknown
- Leo, Purva Phalguni, pada 2; Leo, Purva Phalguni, pada 3; Leo, Purva Phalguni, pada 4; Leo, Uttara Phalguni, pada 1
Unknown time means the entire local date is considered, including any crossed Moon-sign, nakshatra or pada boundaries. It does not mean an assumed noon result is your exact placement. A result near a boundary is sensitive to the recorded time and the chosen sidereal convention.
A nakshatra covers 13°20′ of the sidereal zodiac; a pada covers 3°20′. These divisions identify a position. They do not prove a personality description or predict an event. The public Moon-sign tool uses geocentric lunar positions; it does not calculate a rising sign or a complete house layout.
How to read our evidence
Anantrix publishes these guides. A computed planetary position, a traditional astrological rule and a written interpretation are different kinds of information. Our calculation examples state their inputs and settings so you can reproduce them. Interpretations describe the tradition; they are not scientific evidence that a particular event will happen.
A birth-star guide describes one part of a chart. A birth-star compatibility subtotal is different from a full eight-factor match, and neither decides whether a relationship will succeed. Our daily public horoscopes use the Moon-sign convention and state their reference time; they are not a personal Dasha reading or a Western birthday Sun-sign forecast.
Named authors or reviewers are credited only where their identity and contribution can be verified. Dates describe substantive updates to the relevant material, not a promise that every traditional association was independently validated. If you find an error, send the page URL and the correction. Please omit private birth details from public feedback.
Calculation references
For an official Indian almanac reference, the IMD Rashtriya Panchang publishes computed nirayana (sidereal) positions. For traditional deity associations, see the Nakshatra Sukta (Sanskrit text). These references concern calculated positions and traditional deity associations, respectively. They do not establish the personality, relationship or future-event claims sometimes attached to those positions.
Our astronomical position calculations use Astronomy Engine. Its documentation describes astronomical computations, not the validity of astrological interpretations. Civil timezone changes are documented by the IANA Time Zone Database. Different ayanamsha or house settings can produce different chart labels even for the same birth instant.
Why exact birth time matters
The ascendant moves quickly, so the birth time controls the house layout and every conclusion anchored to it. A small time difference can matter near a house or sign boundary. Moon-based calculations are usually less sensitive, but a birth near a nakshatra boundary can still produce two possible outcomes.
When you do not know the time, Anantrix uses the documented fallback shown in the form and limits the claims that depend on houses. For compatibility specifically, read the guide to what remains reliable without a birth time.
Consistency and updates
The chart calculation is versioned. Derived readings can be regenerated when calculation rules improve, while the original chart data remains the durable source. Time-sensitive pages recalculate current Dasha and transit context instead of treating an old generated paragraph as permanently current.
What this does not claim
Astrology is a cultural and reflective practice, not scientific certainty. Anantrix does not replace medical, legal, financial or mental-health professionals, and important decisions should not rest on an astrology result alone.
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