Moon & Ephemeris Calculator

Real-time moon phase, rise/set times, and astronomical twilight for your location

Detecting your location…

See today’s moon phase and illumination percentage alongside precise moonrise and moonset times for your exact location — updated live in your browser using the SunCalc astronomical library.

The True Darkness Window shows when astronomical twilight ends — the moment the sky reaches its darkest and astrophotographers can capture faint deep-sky objects without twilight interference.

Your location is only used for local calculations. No data ever leaves your device beyond an optional place-name lookup to display a readable city name.

How to Use

  1. 1Allow location access for automatic detection, or type your city name manually — all times are calculated for your specific location.
  2. 2View today’s moon phase, illumination percentage, rise/set times, and current zodiac sign at a glance.
  3. 3Scroll down for the astronomical twilight window — the ‘True Darkness’ hours that astrophotographers need for the best shooting conditions.

Frequently Asked Questions

How accurate are the moon calculations?
Very accurate for practical purposes — we use the SunCalc astronomical library which is widely used by astronomers and photographers.
What is astronomical twilight?
The period when the sun is more than 18° below the horizon — true darkness with no solar illumination. This is the window astrophotographers need for capturing the Milky Way and deep sky objects.
Why does my location affect moonrise times so much?
Because moonrise and moonset times vary significantly by latitude and longitude — even cities 100 miles apart can have noticeably different times.
Is my location data stored?
No — your location is used only to calculate times locally in your browser. It’s never sent to our servers or stored anywhere.