Convert septennial to second (sidereal)
Please provide values below to convert septennial [None] to second (sidereal) [None], or Convert second (sidereal) to septennial.
How to Convert Septennial to Second (Sidereal)
1 None = 221508013.232109 None
Example: convert 15 None to None:
15 None = 15 × 221508013.232109 None = 3322620198.48164 None
Septennial to Second (Sidereal) Conversion Table
| septennial | second (sidereal) |
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Septennial
A septennial is a period of seven years.
History/Origin
The term originates from Latin 'septennium', used historically to denote a seven-year interval, often in contexts such as anniversaries or cycles in various systems.
Current Use
The term 'septennial' is rarely used in modern timekeeping but may appear in historical or literary contexts to describe events or periods lasting seven years.
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.