Almanac & sky · NUMORA
Davison Chart Calculator
Natal of the midpoint datetime.
Open interactive calculatorHow to use
Midpoint in time. Beijing is the reference meridian here.
Formula
JD = (JDa + JDb) / 2
FAQ
Is this Davison Chart 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?
Midpoint in time. Beijing is the reference meridian here.
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