# Sidereal second, Time

Greenwich Mean Sidereal Time (GMST) and UT1 differ from each other in rate, with the second of sidereal time a little shorter than that of UT1, so that (as at 2000 January 1 noon) 1.002737909350795 second of mean sidereal time was equal to 1 second of Universal Time (UT1).

List of all Sidereal second to other time units individual converters.
Convert  Sidereal second

### Metric, SI

Yoctosecond ys 9972695600×1014
Zeptosecond zs 9972695600×1011
Attosecond as 9972695600×108
Femtosecond fs 9972695600×105
Picosecond ps 9972695600×102
Nanosecond ns 997269560
Microsecond µs 997269.56
Millisecond ms 997.2696
Centisecond cs 99.727
Decisecond ds 9.9727
Second s 0.9973
Decasecond das 0.0997
Hectosecond hs 0.01
Kilosecond ks 0.001
Megasecond Ms 9.9727×10-7
Gigasecond Gs 9.9727×10-10
Terasecond Ts 9.9727×10-13
Petasecond Ps 9.9727×10-16
Exasecond Es 9.9727×10-19
Zettasecond Zs 9.9727×10-22
Yottasecond Ys 9.9727×10-25

### Common units

Minute min 0.0166
Hour h 0.0003
Day d 1.1542×10-5
Week 1.6489×10-6
Fortnight 8.2446×10-7
Month 3.7948×10-7
Year y 3.1623×10-8
Century 3.1623×10-10
Millennium 3.1623×10-11

### Sidereal time

Sidereal hour 0.0003
Sidereal day 1.1574×10-5
Sidereal month 4.2247×10-7
Sidereal year 3.1601×10-8

### Other

Shake 99726956
Tropical month 4.2247×10-7
Synodic month 3.9086×10-7
Leap year 3.1537×10-8
Julian year 3.1602×10-8
Tropical year 3.1602×10-8
Septennial 4.5176×10-9
Octennial 3.9529×10-9
Novennial 3.5137×10-9
Quindecennial 2.1082×10-9
Quinquennial 6.3246×10-9

### Result formatting:

Decimal precision:

Apply digit grouping: