Convert second (sidereal) to hour
Please provide values below to convert second (sidereal) [None] to hour [h], or Convert hour to second (sidereal).
1 None = 0.000277019323611 h. To convert second (sidereal) to hour, multiply the value by 0.000277019323611; to go the other way, divide by it (1 h = 3609.85647847 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 = 0.000277019323611 h
- 1 h = 3609.85647847 None
- 10 None = 0.00277019323611 h
- 100 None = 0.0277019323611 h
How to Convert Second (Sidereal) to Hour
1 None = 0.000277019323611111 h
Example: convert 15 None to h:
15 None = 15 × 0.000277019323611111 h = 0.00415528985416667 h
Second (Sidereal) to Hour Conversion Table
| second (sidereal) | hour |
|---|---|
| 1 None | 0.000277019323611 h |
| 2 None | 0.000554038647222 h |
| 3 None | 0.000831057970833 h |
| 5 None | 0.00138509661806 h |
| 10 None | 0.00277019323611 h |
| 20 None | 0.00554038647222 h |
| 50 None | 0.0138509661806 h |
| 100 None | 0.0277019323611 h |
| 500 None | 0.138509661806 h |
| 1000 None | 0.277019323611 h |
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.
Hour
An hour is a unit of time equal to 60 minutes or 3,600 seconds.
History/Origin
The hour has origins in ancient civilizations, notably the Babylonians, who divided the day into 24 hours. The modern 24-hour system was standardized in the 14th century and became widely adopted with the advent of mechanical clocks.
Current Use
Hours are used globally to measure and schedule time in daily life, work, transportation, and various scientific and technical applications.
Frequently Asked Questions
What is 1 second (sidereal) in hour?
1 second (sidereal) (None) = 0.000277019323611 hour (h).
How do you convert second (sidereal) to hour?
Multiply the second (sidereal) value by 0.000277019323611. For example, 25 None × 0.000277019323611 = 0.00692548309028 h.
What is 10 second (sidereal) in hour?
10 None = 0.00277019323611 h.
Which unit is larger, the second (sidereal) or the hour?
The hour is the larger unit: 1 None equals only 0.000277019323611 h.