Calculate exact celestial coordinates for any date and location.
Swiss Ephemeris precision from 6000 BCE to 6000 CE with arcsecond accuracy.
Data Positions API works best in combination with our other tools. Add
Professional accuracy and speed
Everything needed for accurate celestial calculations
Everything developers need for precise celestial coordinate calculations
Data Positions API delivers precise planetary positions for any date and location using Swiss Ephemeris calculations. Unlike basic astronomical APIs that offer limited accuracy or date ranges, our service provides arcsecond precision across 12,000 years of history. Perfect for astrology applications, astronomical software, research platforms, and any project requiring accurate celestial coordinates. With support for 57+ celestial bodies and multiple coordinate systems, you can build professional applications with NASA-validated accuracy. Think of it as a Swiss Ephemeris online API to calculate planetary positions - you get planetary positions via simple REST calls without setting up complex astronomical libraries locally.
Our Data Positions API uses the Swiss Ephemeris SE 2.10 calculation engine with NASA JPL DE431 ephemeris data to compute precise celestial coordinates.
For any given date, time, and location, the system calculates the exact position of planets, asteroids, and other celestial bodies in various coordinate systems.
Calculations account for proper motion, precession, nutation, aberration, and gravitational perturbations to achieve arcsecond accuracy.
Results include geocentric, heliocentric, and topocentric positions with automatic coordinate system transformations.
While most astronomical APIs provide basic planetary positions with limited accuracy, our system offers professional precision validated against NASA Horizons and USNO data.
We support an extensive historical range of 12,000 years from 6000 BCE to 6000 CE, enabling research into ancient astronomical events and historical astrology.
The API includes 57+ celestial bodies including major planets, 47 asteroids, lunar nodes, and hypothetical points like Lilith and Priapus.
Multiple coordinate systems are supported with automatic transformations between equatorial, ecliptic, and galactic coordinates.
Integration requires just a simple HTTP request to our RESTful API endpoint with date, time, and optional location parameters.
The API returns comprehensive position data in JSON format including coordinates, velocities, and angular measurements.
For bulk calculations, use our batch endpoint to process multiple dates efficiently.
The system automatically handles timezone conversions, calendar systems (Julian/Gregorian), and coordinate transformations.
SDKs are available for popular programming languages with built-in error handling and authentication.
Accurate historical positions are crucial for astrological research, archaeological dating, and historical astronomy studies.
Traditional ephemeris tables often contain interpolation errors or limited precision, especially for ancient dates.
Our Swiss Ephemeris implementation maintains consistent accuracy across the entire 12,000-year range, enabling reliable calculations for historical events, ancient birth charts, and astronomical phenomena.
This precision is essential for academic research, historical verification, and building trust in astrological applications.
Build precise birth charts, transit calculations, and progression analysis with exact planetary positions
Create planetarium applications, sky map tools, and astronomy education platforms
Correlate financial markets with planetary cycles using precise historical position data
Support scientific research in astronomy, astrology, and historical studies with verified data
| Position Accuracy | 0.1 arcsecond precision with Swiss Ephemeris |
| Historical Range | 6000 BCE to 6000 CE (12,000 years total) |
| Celestial Bodies | 10 planets + 47 asteroids + lunar nodes + hypotheticals |
| Coordinate Systems | Geocentric, heliocentric, topocentric with transformations |
| Calendar Support | Julian and Gregorian calendars with automatic switching |
| Timezone Handling | All IANA timezones with historical DST changes |
| Output Formats | JSON, XML, CSV with configurable precision |
| Response Time | <500ms for single date, <2s for 100-date batch |
| Rate Limits | 10,000 calculations/hour on Professional plan |
| Coordinate Formats | Degrees/radians, decimal/sexagesimal, HMS/DMS |
| Ephemeris Source | Swiss Ephemeris SE 2.10 with NASA JPL DE431 data |
| Validation | Cross-checked with NASA Horizons and USNO data |
| Geographic Precision | WGS84 ellipsoid with elevation and refraction |
| Batch Processing | Up to 100 calculations per batch request |
| Integration Time | Under 15 minutes with SDKs and examples |
| Feature | Astrology API | Others |
|---|---|---|
| Position Accuracy | 0.1 arcseconds | 1-5 arcminutes |
| Historical Range | 6000 BCE - 6000 CE | 1600 CE - 2200 CE |
| Celestial Bodies | 57+ bodies | 10-15 planets only |
| Coordinate Systems | 6 systems with transformations | 1-2 basic systems |
| Response Time | <500ms | 2-10 seconds |
| Batch Processing | 1000 dates/request | Single date only |
| API Integration | RESTful with SDKs | Manual calculation |
| Calendar Support | Julian + Gregorian | Gregorian only |
| Timezone Handling | Automatic IANA | Manual UTC offset |
| Validation | NASA-verified | Unverified |
| Price | $37/month | $200+ software |
| Updates | Continuous | Manual upgrades |
Real-time planetary positions and aspects for the current moment
Complete birth chart calculations using position data
Calculate planetary transits with precise positions
Sun-centered planetary positions and ephemeris data
Complete technical reference for position calculations
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Everything you need to know