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Sidereal time is the measure of the hour angle of the vernal equinox. At a given sidereal time, the stars appear in the same places in the sky as seen from a fixed point on the Earth's surface. If the mean vernal equinox is used as the origin of the celestial coordinate system, the mean sidereal time is given.
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home.att.net/~srschmitt/siderealtime.html
home.att.net/~srschmitt/siderealtime.html
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Sidereal time - Wikipedia, the free encyclopedia
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Astronomers use sidereal time as a way to keep track of the direction in which their telescopes need to be pointed to view any given star in the night sky. Just as the Sun and Moon appear to rise in...
en.wikipedia.org/wiki/Sidereal_time
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Problem: 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. ... Of Stars and Drops of Water...
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www.grc.nasa.gov/WWW/K-12/Numbers/Math/Mathematical_Thi...
www.grc.nasa.gov/WWW/K-12/Numbers/Math/Mathematical_Thinking/telling_time_by_the_stars.htm
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Calculate the sidereal time at the given time by adding the number of hours since solar noon. The relationship between solar noon and local time depends on location within time zone and whether the time is standard ... Calculate the hour angle of the pointer stars ( just subtract 11 from the sidereal time from step 2 )
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physics.lakeheadu.ca/courses/Astro/2310/sidereal/sidere...
physics.lakeheadu.ca/courses/Astro/2310/sidereal/sidereal.htm
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Compute Local Apparent Sidereal Time ... The daily motion of this point provides a measure of the rotation of the Earth with respect to the stars, rather than the Sun. Local mean sidereal time is computed from the current Greenwich Mean Sideral Time plus an input offset in longitude (converted to a sidereal offset by the...
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tycho.usno.navy.mil/sidereal.html
tycho.usno.navy.mil/sidereal.html
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The sidereal time is measured by the rotation of the Earth, with respect to the stars (rather than relative to the Sun). Local sidereal time is the right ascension (RA, an equatorial coordinate) of a star on the observers meridian.
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www.jgiesen.de/astro/astroJS/siderealClock/
www.jgiesen.de/astro/astroJS/siderealClock/
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The current sidereal time is equal to the hour angle of the vernal equinox. To calculate the hour angel of a certain celestial object subtract the object's right ascension to the sidereal time. ... Because sidereal time is measured relative to the stars and not to the sun, Sidereal Clocks must gain approximately 3m 56s per...
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zeitladen.de/time.html
zeitladen.de/time.html
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sidereal time (ST), time measured relative to the fixed stars; thus, the sidereal day is the period during which the earth completes one rotation on its axis so that some chosen star appears twice on the observer's celestial meridian.
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www.answers.com/topic/sidereal-time
www.answers.com/topic/sidereal-time
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The time of transit depends on the Right Ascension of the star and on the time of day told by the stars (the sidereal time). The diagram below may clarify these angles... ... I use an MS Excel spreadsheet with VBA user defined functions to calculate the tables. Methods are approximate - mean elements for the planet...
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www2.arnes.si/~gljsentvid10/trantable.html
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