Sidereal time calculator online

Online calculator which helps you in calculating and the calculation of stellar time, you can learn the current local sidereal time, and make a calculation on any day of the year.
Starry night — this time a full revolution of the Earth around the axis relative to the stars, which can be considered stationary due to the large distance.
Starry starry day divided into hours, minutes, seconds.
In the year sidereal day contains exactly one more than the mean solar and sidereal day is 3 min 56 sec shorter than the average solar day, sidereal hour is shorter accepted at 9.86 s.
Sidereal time as the time unit used in the cases when organizing astronomical observations.
To calculate on any day of the year:
Put a tick in the box "Enter your input".
You can then fill in the fields.


Hour: minutes: seconds (local time):

UT local time: hours
Geographical longitude of the place:
 °   '   "
Enter your input?
Estimated Stellar Time (True):