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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.| 542500 Sidereal Years | to common time units |
|---|---|
| 542500 Sy | = 17120296105920 seconds (s) |
| 542500 Sy | = 285338268432 minutes (min) |
| 542500 Sy | = 4755637807.2 hours (hr) |
| 542500 Sy | = 198151575.3 days (day) |
| 542500 Sy | = 28307367.9 weeks (wk) |
| 542500 Sy | = 542881.02821918 years (yr) |
| 542500 Sy | = 6514572.3386301 months (mo) |
| 542500 Sy | = 54281.217837413 decades (dec) |
| 542500 Sy | = 5428.1217837413 centuries (cent) |
| 542500 Sy | = 542.81217837413 millenniums (mill) |