Orbital Calculator
Enter any year to compute all Holistic Universe Model predictions. Negative years represent BCE dates; decimal values are accepted (e.g., 2000.5 for mid-year). All calculations run instantly in your browser.
The calculator has two modes, selectable from the tabs at the top:
- Single Year — computes every output below for one specific year. When the year input rounds to 2000, a “J2000 reference values shown” badge appears and the orbital-elements and time-period tables display a side-by-side Model | J2000 Reference column for direct comparison against published IAU/NASA values.
- Batch Export — generates a CSV file covering a year range with configurable from/to/step values. Choose one of four datasets (Earth orbital elements, Earth time periods, all-planet perihelion precession, or all-planet orbital elements) and click Download CSV.
J2000 reference values shown
These values are computed using the same formulas documented on the Formulas page, ported to TypeScript. Planet fluctuation predictions use the unified ~2,400-term predictive formula (R² > 0.99998 for all planets). See per-planet accuracy metrics. The underlying Python source code is available on GitHub .
Output Reference (Single Year mode)
| Section | Description |
|---|---|
| Earth — Orbital Elements | Perihelion longitude, obliquity, eccentricity, inclination to invariable plane |
| Earth — Time Periods | Solar, sidereal, and anomalistic years (in days and SI seconds); solar day, sidereal day, stellar day |
| Earth — Cardinal Points | For each cardinal point (Vernal Equinox, Summer Solstice, Autumnal Equinox, Winter Solstice): date, Julian Day, RA (degrees), and year length (days) |
| Earth — Precession Periods | Axial, perihelion, and inclination precession periods |
| All Planets — Perihelion Precession | Perihelion longitude, baseline rate, fluctuation, and total precession for all 8 planets |
| All Planets — Orbital Elements | Ascending node longitude, inclination to invariable plane, and eccentricity for all 8 planets |
For the mathematical derivations behind each formula, see Formulas.
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