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The hour (common symbol: h or hr, h being the international form of the symbol) is a unit of measurement of time. In modern usage, an hour comprises 60 minutes, or 3,600 second ..more definition+
In relation to the base unit of [time] => (seconds), 1 Sidereal Days (Sd) is equal to 86164.1 seconds, while 1 Hours (hr) = 3600 seconds.| 21600 Sidereal Days | to common time units |
|---|---|
| 21600 Sd | = 1861144560 seconds (s) |
| 21600 Sd | = 31019076 minutes (min) |
| 21600 Sd | = 516984.6 hours (hr) |
| 21600 Sd | = 21541.025 days (day) |
| 21600 Sd | = 3077.2892857143 weeks (wk) |
| 21600 Sd | = 59.016506849315 years (yr) |
| 21600 Sd | = 708.19808219178 months (mo) |
| 21600 Sd | = 5.9009022194039 decades (dec) |
| 21600 Sd | = 0.59009022194039 centuries (cent) |
| 21600 Sd | = 0.059009022194039 millenniums (mill) |