Convert second (sidereal) to second
Please provide values below to convert second (sidereal) [None] to second [s], or Convert second to second (sidereal).
1 None = 0.997269565 s. To convert second (sidereal) to second, multiply the value by 0.997269565; to go the other way, divide by it (1 s = 1.00273791069 None). Both units measure time and appear in everyday as well as technical calculations, so switching between them quickly is often useful.
Quick Reference
- 1 None = 0.997269565 s
- 1 s = 1.00273791069 None
- 10 None = 9.97269565 s
- 100 None = 99.7269565 s
How to Convert Second (Sidereal) to Second
1 None = 0.997269565 s
Example: convert 15 None to s:
15 None = 15 × 0.997269565 s = 14.959043475 s
Second (Sidereal) to Second Conversion Table
| second (sidereal) | second |
|---|---|
| 1 None | 0.997269565 s |
| 2 None | 1.99453913 s |
| 3 None | 2.991808695 s |
| 5 None | 4.986347825 s |
| 10 None | 9.97269565 s |
| 20 None | 19.9453913 s |
| 50 None | 49.86347825 s |
| 100 None | 99.7269565 s |
| 500 None | 498.6347825 s |
| 1000 None | 997.269565 s |
Second (Sidereal)
A second (sidereal) is the time measurement based on Earth's rotation relative to distant stars, approximately 3 minutes shorter than the solar second, used in astronomy.
History/Origin
The sidereal second has origins in astronomical observations of Earth's rotation relative to distant celestial objects. It was established to provide a precise time standard for celestial measurements, differing from the solar second used in everyday timekeeping.
Current Use
The sidereal second is primarily used in astronomy and astrophysics for precise time measurements related to celestial events, star tracking, and satellite navigation systems.
Second
The second (symbol: s) is the base unit of time in the International System of Units (SI), used to measure durations and intervals.
History/Origin
The second was originally defined as 1/86400 of a mean solar day. It was later redefined in 1967 based on atomic properties, specifically as the duration of 9,192,631,770 periods of radiation corresponding to the transition between two hyperfine levels of the cesium-133 atom.
Current Use
The second is universally used in science, technology, and everyday life to quantify time intervals, synchronize clocks, and coordinate activities across various fields.
Frequently Asked Questions
What is 1 second (sidereal) in second?
1 second (sidereal) (None) = 0.997269565 second (s).
How do you convert second (sidereal) to second?
Multiply the second (sidereal) value by 0.997269565. For example, 25 None × 0.997269565 = 24.931739125 s.
What is 10 second (sidereal) in second?
10 None = 9.97269565 s.
Which unit is larger, the second (sidereal) or the second?
The second is the larger unit: 1 None equals only 0.997269565 s.