Convert Attoseconds to Sidereal Months
Convert Attoseconds (as) to Sidereal Months (sid.mo) instantly and accurately.
Conversion Formula
sid.mo = as × 4.236226261e-25
About Attoseconds
An attosecond (as) = 10⁻¹⁸ s - the timescale of electron dynamics in atoms. The Bohr-model orbital period in hydrogen is ~152 as. Electron tunnelling through atomic potential barriers takes a few hundred as. The 2023 Nobel Prize in Physics (Agostini, Krausz, L'Huillier) honoured methods for generating sub-100 as pulses via high-harmonic generation in Ti:sapphire lasers. 1 as = 10⁻¹⁸ s = 1,000 zs.
About Sidereal Months
The sidereal month = Moon's orbital period relative to the fixed stars = 27.3217 days = 2,360,591.6 s - the shortest lunar month. It is ~2.21 days shorter than the synodic month (29.53 d) because Earth advances ~27° along its orbit in the same period; the Moon must travel further to re-align with the Sun. Used in GPS orbit design, tidal modelling, and lunar laser ranging. 1 sid.mo = 27.3217 d.
Quick Reference Table
| Attoseconds (as) | Sidereal Months (sid.mo) |
|---|---|
| 1 as | 4.236 × 10-25 sid.mo |
| 2 as | 8.472 × 10-25 sid.mo |
| 5 as | 2.118 × 10-24 sid.mo |
| 10 as | 4.236 × 10-24 sid.mo |
| 25 as | 1.059 × 10-23 sid.mo |
| 50 as | 2.118 × 10-23 sid.mo |
| 100 as | 4.236 × 10-23 sid.mo |