Convert Anomalistic Months to Fortnights
Convert Anomalistic Months (anom.mo) to Fortnights (fn) instantly and accurately.
Conversion Formula
fn = anom.mo × 1.968182217
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.
About Fortnights
A fortnight = exactly 14 days = 2 weeks = 1,209,600 s. From Old English 'feowertiene niht' (fourteen nights), reflecting the Germanic custom of counting nights. Common in British, Irish, Australian, and NZ English for pay periods, rental cycles, and parliamentary recesses. The Moon's phase advances ~half a synodic month (≤14.77 days) per fortnight; spring and neap tides also cycle fortnightly. 1 fortnight = 14 d = 1,209,600 s.
Quick Reference Table
| Anomalistic Months (anom.mo) | Fortnights (fn) |
|---|---|
| 1 anom.mo | 1.96818 fn |
| 2 anom.mo | 3.93636 fn |
| 5 anom.mo | 9.84091 fn |
| 10 anom.mo | 19.6818 fn |
| 25 anom.mo | 49.2046 fn |
| 50 anom.mo | 98.4091 fn |
| 100 anom.mo | 196.818 fn |