Transit Database & Alignment Finder
A temporal search engine for planetary configurations. Describe an alignment; find every date across 1800–3000 CE when it actually occurred.
Build your query
Find every date when all of these planetary positions occur together. Each row is one planet; rows are combined with AND.
Tip: pair the Moon with slow planets (Saturn, Jupiter, Rahu) to narrow a chart to a few windows. One fast planet alone returns thousands of dates.
What is the Transit Database?
The Transit Database is a searchable record of where every graha sat in the zodiac on every single day from 1800 CE to 3000 CE, computed with the Swiss Ephemeris. That is over 438,000 daily snapshots, each carrying the sign, nakshatra, pada, and motion (direct, retrograde, or stationary) of all nine planets.
Instead of casting one chart for one moment, you work in reverse: you describe a planetary configuration and the tool returns every date on which that configuration was true. The search runs on this site and returns results in well under a second.
How planetary positions pinpoint a date
Each planet moves through the zodiac at its own speed, so a combination of placements forms a unique fingerprint in time. The Moon circuits all twelve signs in about 27 days, so Moon-in-a-sign lasts roughly 2.5 days. Jupiter spends about a year in each sign; Saturn about 2.5 years. Rahu and Ketu hold a sign for roughly 18 months.
Combine a slow planet's sign with the Moon's sign and you collapse a 1,200-year span down to a handful of narrow windows. Add the Moon's nakshatra and pada, or a second slow planet, and the overlap can tighten to a few days. Slow planets are coarse filters; the Moon, nakshatras, and padas are the fine ones.
What you can do with it
Date a chart
Have planetary signs from an old or undocumented kundli but no date? Enter the placements and read off the candidate windows to recover a birth year, decade, or month.
Electional astrology
Planning a wedding, launch, or contract? Search future years for the arrangement you want - say Jupiter in Cancer with Venus in Taurus and Mars direct - and pick the window that lands best.
Historical & mundane cycles
Slow planets shape eras. Search backward into the 1800s and 1900s to see exactly when Saturn, Jupiter, or Rahu entered a sign, and line those shifts up against historical events.
Chart rarity
Wonder how unusual your placements are? Enter them down to nakshatra and pada to see how many times that exact combination recurs across the full 1,200-year timeline.
Retrograde & stationary loops
Track macro-geometry across centuries. Filter for a planet turning retrograde or stationary in a specific sign to study long-term patterns in its cycles.
Generational threads
Look up the alignment windows of grandparents, parents, and descendants to find planet-sign placements that run like a thread through a family line.
How to use the tool
- Add a row for each planet you know, and pick its sign.
- Turn on advanced filters to also constrain motion, nakshatra, or pada when you know them.
- Prioritise the Moon plus slow planets (Saturn, Jupiter, Rahu, Ketu) for the most useful narrowing.
- Optionally limit the year range, then press Find dates.
- Expand any result window to see the full sky for that day, and cross-reference with anything else you know to settle on a final date.
Frequently Asked Questions
How does the Transit Database work?
You describe a set of planetary positions (for example, Moon in Scorpio, Saturn in Capricorn, Jupiter retrograde). The tool searches a precomputed ephemeris covering every day from 1800 to 3000 CE and returns every date range when all those conditions were simultaneously true. Each window can be expanded to see the full sky for that day.
Which positions should I provide to narrow a birth date?
Combine the Moon (which changes sign every ~2.5 days) with slow-moving planets like Saturn, Jupiter, Rahu, and Ketu. Slow planets pin down a decade or year; the Moon plus its nakshatra and pada narrow to days. A single fast-planet condition alone returns thousands of matches.
How accurate is dating a chart from planetary positions?
Moon sign plus Saturn and Jupiter signs typically narrow results to a 10–30 year band. Adding Rahu/Ketu and the Moon's nakshatra and pada can narrow to a handful of days. Sign placements cannot fix an exact birth time on their own; house positions and the ascendant still require a known time of birth.
What date range and how much data does it cover?
The database covers 1800 CE to 3000 CE: roughly 1,200 years and over 438,000 daily ephemeris rows. It spans virtually all living people and their ancestors, plus future dates for electional planning.
What does the Motion filter (Direct, Retrograde, Stationary) mean?
Motion describes how a planet appears to move along the zodiac on a given day. Direct is normal forward motion, Retrograde is apparent backward motion, and Stationary is the brief turning point between the two. The Sun and Moon are always Direct; the other planets cycle through all three.