Moon phase synodic cycle
The Moon phase synodic cycle is the average time between identical lunar phases, such as from one full moon to the next.
Also known as: synodic month, lunar phase cycle
How big is it?
29.53 days
Mean synodic month · approximate
A little perspective
Venus solar day is about 3.95 times larger on this measurement.
Venus solar day: A Venus solar day is the interval between two successive sunrises at the same location on Venus, which is much longer than an Earth day.
Measurements, assumptions & sources +
Moon phase synodic cycle
The mean interval between matching lunar phases is about 2,551,443 seconds, or 29.5306 days. Individual lunations vary.
The marked mean synodic month is calibrated. Unmeasured illustration details are representative.
Venus solar day
One Venus solar day lasts about 116.75 Earth days, approximately 10.09 million seconds. This differs from Venus’s longer retrograde sidereal rotation period.
The marked solar day is calibrated. Unmeasured illustration details are representative.
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Why this measurement?
Why we use 29.53 days
For comparison, this page uses mean synodic month. This is labelled approximate; the central value is useful for comparison, while real values or measurement solutions can vary.
The mean interval between matching lunar phases is about 2,551,443 seconds, or 29.5306 days. Individual lunations vary.
The identifying illustration and the numerical comparison remain separate. How calibrated comparisons work →
Recorded properties
Moon phase synodic cycle dimensions and measurements
| Property | Selected value | Recorded range | Basis |
|---|---|---|---|
| 29.53 days | Not recorded | approximate |
Around this scale
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These links use compatible time records, ordered around the selected value.
Nearest lower value · TimeGeostationary satellite orbit23.93 hA geostationary satellite orbit is a circular path above Earth's equator where a satellite moves at the same rate as Earth's rotation, appearing stationary over one longitude.Nearest higher value · TimeVenus solar day116.8 daysA Venus solar day is the interval between two successive sunrises at the same location on Venus, which is much longer than an Earth day.Sources and method
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The source records and measurement method remain available for inspection.
- NASA — Moon factsMean lunar orbital speed and synodic phase-cycle context.
There’s always another scale
Follow your curiosity.
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