Convert Draconic Months to Synodic Months
Convert Draconic Months (drac.mo) to Synodic Months (syn.mo) instantly and accurately.
Conversion Formula
syn.mo = drac.mo × 0.9214926304
About Draconic Months
The draconic (nodical) month = 27.2122 days = 2,351,135.8 s - the interval between successive Moon passages through the same orbital node. Named from the Latin 'draco' (dragon): eclipses only occur near the nodes, where the Moon can align with the Sun or Earth's shadow. The Saros cycle (18 yr 11 d) equals ~242 draconic months, enabling eclipse sequence forecasting. 1 drac.mo = 27.2122 d.
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.
Quick Reference Table
| Draconic Months (drac.mo) | Synodic Months (syn.mo) |
|---|---|
| 1 drac.mo | 0.921493 syn.mo |
| 2 drac.mo | 1.84299 syn.mo |
| 5 drac.mo | 4.60746 syn.mo |
| 10 drac.mo | 9.21493 syn.mo |
| 25 drac.mo | 23.0373 syn.mo |
| 50 drac.mo | 46.0746 syn.mo |
| 100 drac.mo | 92.1493 syn.mo |