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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 Years (Sy) is equal to 31558149.504 seconds, while 1 Hours (hr) = 3600 seconds.| 1900 Sidereal Years | to common time units |
|---|---|
| 1900 Sy | = 59960484057.6 seconds (s) |
| 1900 Sy | = 999341400.96 minutes (min) |
| 1900 Sy | = 16655690.016 hours (hr) |
| 1900 Sy | = 693987.084 days (day) |
| 1900 Sy | = 99141.012 weeks (wk) |
| 1900 Sy | = 1901.3344767123 years (yr) |
| 1900 Sy | = 22816.013720548 months (mo) |
| 1900 Sy | = 190.10933436145 decades (dec) |
| 1900 Sy | = 19.010933436145 centuries (cent) |
| 1900 Sy | = 1.9010933436145 millenniums (mill) |