Almanac & sky · NUMORA

Ephemeris Day Calculator

One day of planetary longitudes.

How to use

Longitudes for one day. Not a 9000-year PDF.

Formula

FAQ

Is this Ephemeris Day calculator accurate?

The formula and assumptions are shown on the page, and the engine is covered by audit tests. Results are for reference — not financial or medical advice.

Do I need an account?

No. Calculations run in your browser. Recents can stay on this device.

What inputs do I need?

Longitudes for one day. Not a 9000-year PDF.

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