Convert hour (sidereal) to octennial
Please provide values below to convert hour (sidereal) [None] to octennial [None], or Convert octennial to hour (sidereal).
How to Convert Hour (Sidereal) to Octennial
1 None = 1.42207044816463e-05 None
Example: convert 15 None to None:
15 None = 15 × 1.42207044816463e-05 None = 0.000213310567224694 None
Hour (Sidereal) to Octennial Conversion Table
| hour (sidereal) | octennial |
|---|
Hour (Sidereal)
An hour (sidereal) is a unit of time based on the Earth's rotation relative to distant stars, equal to approximately 3,894 seconds, used primarily in astronomy.
History/Origin
The sidereal hour originated from the ancient division of the day based on Earth's rotation relative to the stars, differing from the solar hour by about 4 minutes, and has been used historically in astronomy for precise timekeeping.
Current Use
Sidereal hours are mainly used in astronomy and astrophysics to measure celestial events and the Earth's rotation relative to distant celestial objects, rather than in everyday timekeeping.
Octennial
An octennial is a period of eight years.
History/Origin
The term 'octennial' has been used historically in various contexts to denote an eight-year interval, originating from Latin roots 'octo' meaning eight and 'annus' meaning year.
Current Use
Today, 'octennial' is rarely used in everyday language but may appear in academic or historical references to denote an eight-year span.