Convert Tropical Years to Microcenturies
Convert Tropical Years (a_trop) to Microcenturies (µcy) instantly and accurately.
Conversion Formula
µcy = a_trop × 9999.786174
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 Microcenturies
A microcentury (µcy) = 10⁻⁶ of a Julian century = 3,155.76 s ≈ 52 min 35.76 s. Popularised by Richard Feynman, who told audiences a one-hour lecture was 'approximately one microcentury'. An 87-minute film ≈ 1.65 microcenturies. No formal SI recognition, but a favourite pedagogical example of SI prefixes applied to large bases. 1 µcy = 3,155.76 s = 52.596 min.
Quick Reference Table
| Tropical Years (a_trop) | Microcenturies (µcy) |
|---|---|
| 1 a_trop | 9999.79 µcy |
| 2 a_trop | 19999.6 µcy |
| 5 a_trop | 49998.9 µcy |
| 10 a_trop | 99997.9 µcy |
| 25 a_trop | 249995 µcy |
| 50 a_trop | 499989 µcy |
| 100 a_trop | 999979 µcy |