Second (Sidereal) to Year (Sidereal) Converter
Unit Converter
Instant · Precise · Universal
28 units available
6 categories total
How to Convert Second (Sidereal) to Year (Sidereal)
To convert sidereal seconds to solar seconds: multiply by 0.99727. One solar second ≈ 1.00274 sidereal seconds.
1 sidereal second ≈ 0.99727 solar seconds. 86,400 sidereal seconds = 1 sidereal day.
For example, 1 Second (Sidereal) (s (Sid)) = 3.160102e-8 Year (Sidereal) (yr (Sid)).
Second (Sidereal) to Year (Sidereal) — Common Values
| Second (Sidereal) (s (Sid)) | Year (Sidereal) (yr (Sid)) |
|---|---|
| 0.1 | 3.160102e-9 |
| 0.5 | 1.580051e-8 |
| 1 | 3.160102e-8 |
| 2 | 6.320203e-8 |
| 5 | 1.580051e-7 |
| 10 | 3.160102e-7 |
| 25 | 7.900254e-7 |
| 50 | 0.000001580050807 |
| 100 | 0.000003160101614 |
| 500 | 0.00001580050807 |
| 1000 | 0.00003160101614 |
About Second (Sidereal) (s (Sid))
Definition
The sidereal second is 1/60 of a sidereal minute — approximately 0.99727 solar seconds.
Mathematical Relationship
1 sidereal second ≈ 0.99727 solar seconds. 86,400 sidereal seconds = 1 sidereal day.
Conversion Formula
To convert sidereal seconds to solar seconds: multiply by 0.99727. One solar second ≈ 1.00274 sidereal seconds.
Practical Applications
Telescope tracking motors rotate at sidereal rate (1 revolution per sidereal day) to follow stars across the sky.
Interesting Facts
The difference between sidereal and solar seconds (2.73 ms) seems tiny, but over a day it adds up to the full ~236 s difference.
Common Mistakes
Assuming sidereal seconds equal solar seconds. The ~0.27% difference is critical in precision astronomy.
Educational Tips
Multiply any sidereal time interval by 0.99727 to get the solar equivalent. This ratio stays constant at all time scales.
About Year (Sidereal) (yr (Sid))
Definition
The sidereal year is the time for Earth to complete one orbit relative to the fixed stars — approximately 365.25636 days (31,558,149.7632 seconds).
Mathematical Relationship
1 sidereal year ≈ 365.25636 days ≈ 365 d 6 h 9 min 10 s. About 20 min 24 s longer than the tropical year.
Conversion Formula
To convert sidereal years to days: multiply by 365.25636. To tropical years: multiply by 365.25636/365.24219.
Practical Applications
Tracking stellar positions, calculating satellite orbital decay, and determining long-term star catalog corrections.
Interesting Facts
The ~20-minute difference between sidereal and tropical years is caused by axial precession — Earth's axis traces a full circle every ~25,772 years.
Common Mistakes
Using sidereal year when tropical year is intended (or vice versa) in calendar calculations.
Educational Tips
Think of it this way: the sidereal year measures Earth's orbit relative to stars. The tropical year measures relative to seasons. Precession makes them differ.