Convert Tropical Years to Attoseconds
Convert Tropical Years (a_trop) to Attoseconds (as) instantly and accurately.
Conversion Formula
as = a_trop × 3.155692522e+25
About Tropical Years
The tropical year = time from March equinox to the next = 365.24219 days = 31,556,925.2 s - the year that governs the seasons. The Gregorian 97/400 leap rule approximates it as 365.2425 days, leaving a residual drift of only ~26.8 s/year. The tropical year shortens ~0.53 s per century due to tidal deceleration. Persian Solar Hijri and Mayan Haab' calendars also approximate it. 1 a_trop ≈ 365.24219 d.
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.
Quick Reference Table
| Tropical Years (a_trop) | Attoseconds (as) |
|---|---|
| 1 a_trop | 3.156 × 1025 as |
| 2 a_trop | 6.311 × 1025 as |
| 5 a_trop | 1.578 × 1026 as |
| 10 a_trop | 3.156 × 1026 as |
| 25 a_trop | 7.889 × 1026 as |
| 50 a_trop | 1.578 × 1027 as |
| 100 a_trop | 3.156 × 1027 as |