Convert Milliseconds to Sidereal Days
Convert Milliseconds (ms) to Sidereal Days (sid.d) instantly and accurately.
Conversion Formula
sid.d = ms × 1.160576284e-8
About Milliseconds
A millisecond (ms) = 10⁻³ s. Human visual reaction time 150-300 ms; auditory reaction 140-160 ms. Echo delays below ~30 ms cause Haas reinforcement; 100-500 ms are perceived as distinct echoes. One cinema frame at 24 fps = 41.7 ms; 60 fps gaming requires 16.7 ms/frame. Millisecond pulsars rotate in 1.4-30 ms. MIDI keyboard on-latency 1-3 ms. 1 ms = 10⁻³ 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
| Milliseconds (ms) | Sidereal Days (sid.d) |
|---|---|
| 1 ms | 1.161 × 10-8 sid.d |
| 2 ms | 2.321 × 10-8 sid.d |
| 5 ms | 5.803 × 10-8 sid.d |
| 10 ms | 1.161 × 10-7 sid.d |
| 25 ms | 2.901 × 10-7 sid.d |
| 50 ms | 5.803 × 10-7 sid.d |
| 100 ms | 1.161 × 10-6 sid.d |