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Loading contentThe current Moon phase and illuminated fraction, computed from public-domain astronomical formulae and timestamped, plus location-aware moonrise, moonset, transit, and the Moon's altitude and azimuth for any latitude and longitude. Your location is used only for the calculation and is never stored.
Computing current Moon phase…
Privacy: your location is used only for this calculation and is not stored. No browser geolocation or IP lookup is used — coordinates come only from what you type. Leave the date blank for the Moon's position right now.
The Moon phase and illumination above are global. Enter a latitude and longitude to compute moonrise, moonset, transit, and the Moon's altitude and azimuth for your location — nothing is shown until you do, and no location is assumed.
The Moon cycles through its phases every 29.530588853 days (the synodic month). These are timeless facts; the current phase and illumination — and, for your location, moonrise, moonset, and the Moon's position — are computed above from public-domain formulae and timestamped.
Facts on this topic will be cited from these primary and reference sources.
Precise time, almanac data, Sun/Moon rise-set, and phases.
Orbital data, ephemerides, and small-body parameters for planets, asteroids, and comets.