Convert Attoseconds to Julian Years
Convert Attoseconds (as) to Julian Years (a_J) instantly and accurately.
Conversion Formula
a_J = as × 3.168808781e-26
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 Julian Years
The Julian year (a_J) = exactly 365.25 days = 31,557,600 s - the IAU standard year for astronomical distances. The light-year is formally 1 ly = c × 1 a_J = 9.461 × 10¹⁵ m (IAU 2012 B2). Julian years differ from Gregorian years by only 648 s (~10.8 min/year); important for high-precision astrometry or calculations spanning centuries. 1 a_J = 365.25 d = 31,557,600 s.
Quick Reference Table
| Attoseconds (as) | Julian Years (a_J) |
|---|---|
| 1 as | 3.169 × 10-26 a_J |
| 2 as | 6.338 × 10-26 a_J |
| 5 as | 1.584 × 10-25 a_J |
| 10 as | 3.169 × 10-25 a_J |
| 25 as | 7.922 × 10-25 a_J |
| 50 as | 1.584 × 10-24 a_J |
| 100 as | 3.169 × 10-24 a_J |