Convert Microseconds to Sidereal Days
Convert Microseconds (µs) to Sidereal Days (sid.d) instantly and accurately.
Conversion Formula
sid.d = µs × 1.160576284e-11
About Microseconds
A microsecond (µs) = 10⁻⁶ s; light travels ~300 m. Professional DSLR shutters reach 125 µs (1/8,000 s); electronic flash freezes motion in 1-50 µs. Radar pulse repetition intervals: 100-2,000 µs (15-300 km range). Ultrasound echo round-trips from 1-15 cm tissue depth: 13-200 µs. Muscle twitch contraction starts within 1-5 µs of the action potential. 1 µs = 10⁻⁶ s.
About Sidereal Days
A sidereal day = Earth's rotation period relative to the stars = 23 h 56 min 4.0905 s = 86,164.0905 s - ~3 min 56 s shorter than the 24 h solar day because Earth advances ~1° in its orbit each day. Equatorial telescope mounts rotate at one turn per sidereal day to track stars. VLBI, GPS orbit determination, and polar-motion monitoring use sidereal rotation as their reference. 1 sid. day = 86,164.0905 s.
Quick Reference Table
| Microseconds (µs) | Sidereal Days (sid.d) |
|---|---|
| 1 µs | 1.161 × 10-11 sid.d |
| 2 µs | 2.321 × 10-11 sid.d |
| 5 µs | 5.803 × 10-11 sid.d |
| 10 µs | 1.161 × 10-10 sid.d |
| 25 µs | 2.901 × 10-10 sid.d |
| 50 µs | 5.803 × 10-10 sid.d |
| 100 µs | 1.161 × 10-9 sid.d |