Sidereal time
Sidereal time is a time scale that is based on Earth's rate of rotation measured relative to the fixed stars.
Sidereal Time - Astronomical Applications Department
Sidereal time is the right ascension of celestial objects transiting (crossing) the meridian as the Earth rotates.
Solar Time vs. Sidereal Time - Las Cumbres Observatory
Solar timeWe measure time on Earth by the position of celestial objects in the sky. Solar time is based on the position of the sun. It is the time we all ...
The Sidereal Day - Little Known & Little Understood, Here's a Quick ...
The sidereal day uses the regularity of Earth's rotation about its axis with reference to the stars. A day is defined as the time it takes the earth to rotate ...
Sidereal time | Celestial Coordinates, Celestial Sphere & Equinoxes
Sidereal time, time as measured by the apparent motion about the Earth of the distant, so-called fixed, stars, as distinguished from solar time, ...
Local Sidereal Time for your location, anywhere in the World. Also UTC World Time.
Telling Time by the Stars - Sidereal Time
Let the vernal equinox occur at noon solar time on March 21 of a certain year. Estimate the sidereal time at 3:00 pm solar time on November 29 of the same year.
What is sidereal time and why should I care?
Sidereal time is not as complicated as you may think. Let us look at 'standard' time; we measure it in divisions of the earth rotating on it's axis (ie ...
Local Sidereal Time - Astronomy at Durham
We use the term local sidereal time to denoted the RA coordinate on the celestial sphere that currently lies on the observer's meridian.
Sidereal time: What is it? - EarthSky
In other words, a solar day is how long it takes Earth to rotate once – and then some. A sidereal day – 23 hours 56 minutes and 4.1 seconds – is ...
The mean sidereal day measured by the time elapsed between two consecutive transits of any star at the same meridian, and the mean sidereal year, which is the ...
Sidereal Time: The rotation of the Earth causes a regular change in the apparent positions of stars, so the hour angle of a star can be used as a measure of ...
Formulas - Sidereal Time - Astronomy Online
Divide 360° into 1440 minutes and there is 4 minutes left over. To match with Sidereal time, the Earth must rotate 1° more for the Sun to appear in the same ...
Getting technical: sidereal time - Watchfinder
A day lasts only 23 hours, 56 minutes and 4 seconds. The reason for these missing minutes is due to the relative position of the Earth to the sun in space.
Astronomical Calculations: Sidereal Time - James Still
My LST on the vernal equinox that took place last Thursday was 7h 31m 53s. If I consult my handy-dandy planisphere (or any online resource) I see that the ...
Computing Approximate Sidereal Time
Below is an algorithm for computing apparent sidereal time to an accuracy of about 0.1 second of time, equivalent to about 1.5 arcseconds on the sky.
SiderealTime - Wolfram Language Documentation
Sidereal time is typically used to locate celestial objects in the night sky and to decide when and where to point a telescope for optimal observation.
Sidereal Time App - Apps on Google Play
This app will calculate the local sidereal time base on your location.
Sidereal time Definition & Meaning - Merriam-Webster
The meaning of SIDEREAL TIME is time based on the sidereal day.
Understanding the difference between local time and local sidereal ...
1 Answer 1 ... Local siderean time is the time it takes for the stars to return to the same position in the sky. This is a different time as for ...