Convert Synodic Months to Anomalistic Months
Convert Synodic Months (syn.mo) to Anomalistic Months (anom.mo) instantly and accurately.
Conversion Formula
anom.mo = syn.mo × 1.071713664
About Synodic Months
A synodic (lunar) month = new moon to new moon = 29.5306 days = 2,551,442.9 s. Longer than the sidereal month (27.32 d) because Earth advances ~27° in its orbit during that time; the Moon must travel further to realign with the Sun. Islamic Hijri, Hebrew lunisolar, and Chinese calendars are built on synodic months. Eclipses repeat via the Saros cycle (18 yr 11 d = 223 synodic months). 1 syn.mo ≈ 29.5306 d.
About Anomalistic Months
The anomalistic month = interval between successive Moon perigees = 27.5546 days = 2,380,713.2 s. Slightly longer than the sidereal month because the Moon's perigee precesses, completing one revolution in ~8.85 years. Governs 'supermoons': a full moon at perigee appears ~14% wider and 30% brighter. Tidal forces at perigee are ~30% stronger than at apogee. 1 anom.mo = 27.5546 d.
Quick Reference Table
| Synodic Months (syn.mo) | Anomalistic Months (anom.mo) |
|---|---|
| 1 syn.mo | 1.07171 anom.mo |
| 2 syn.mo | 2.14343 anom.mo |
| 5 syn.mo | 5.35857 anom.mo |
| 10 syn.mo | 10.7171 anom.mo |
| 25 syn.mo | 26.7928 anom.mo |
| 50 syn.mo | 53.5857 anom.mo |
| 100 syn.mo | 107.171 anom.mo |