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Information on calculating Greenwich mean sidereal time (GMST) and Greenwich apparent sidereal time (GAST). ... It will be necessary to reduce GMST to the range 0h to 24h. Setting H = 0 in the above formula yields the Greenwich mean sidereal time at 0h UT, which is tabulated in The Astronomical Almanac.
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aa.usno.navy.mil/faq/docs/GAST.php
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Greenwich Mean and Apparent Sidereal Time for Julian Day Date in Degrees of Arc ... The first grayed equation below is a general formula that can convert a given JD date/time to GMST or GAST. The next two are easy to remember wrapper functions that accomplish one or the other conversion.
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www.pietro.org/Astro_Util_StaticDemo/FDetailSiderealCon...
www.pietro.org/Astro_Util_StaticDemo/FDetailSiderealConv.htm
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GMST - Greenwich Mean Sidereal Time ... A more accurate formula, with adds terms smaller than 20 microseconds, is given in the Explanatory Supplement to the Astronomical Almanac [ref 4]. Planetary motions are now computed using TDB.
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www.cv.nrao.edu/~rfisher/Ephemerides/times.html
www.cv.nrao.edu/~rfisher/Ephemerides/times.html
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Free sidereal time formula Download at WareSeeker.com - Displays the current Local Apparent Sidereal Time (LAST), used in astronomy.
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wareseeker.com/free-sidereal-time-formula/
wareseeker.com/free-sidereal-time-formula/
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Mean sidereal time ------------------ The mean sidereal time at zero longitude is often called Greenwich Mean sidereal Time or GMST. The formula below is based on Meeus formula 11.4 with terms in the square and the cube of the time left out.
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www2.arnes.si/~gljsentvid10/sidereal.htm
www2.arnes.si/~gljsentvid10/sidereal.htm
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sidereal time at midnight Local time for each day of the year. This table changes by a few minutes of sidereal time year on year depending where we are in the leap year cycle. ... The formula above gives the hour angle at setting or rising. Remember that the Hour angle at transit is zero by definition, so H is also the...
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www2.arnes.si/~gljsentvid10/trantable.html
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Equation of time - Wikipedia, the free encyclopedia
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The equation of time is the difference between apparent solar time and mean solar time, both taken at a given place (or at another place with the same geographical longitude) at the same real instan...
en.wikipedia.org/wiki/Equation_of_time
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The local sidereal time is clearly very useful for astronomers. It can be calculated from the local civil time and observer's longitude using a relatively simple formula, see e.g. Page 16-20, Duffett-Smith's ``Practical Astronomy'' or Page 40-1, Montebruck and Pfleger's ``Astronomy on the Personal Computer (4th edition)''.
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www.dur.ac.uk/john.lucey/users/lst.html
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9. Computation of the variables and of the sidereal time ... The development of contains polynomials in time and Poisson terms but no periodic terms. ... The sidereal time is given in (10). The periodic terms of the sidereal time are therefore the same as the periodic terms of .
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aa.springer.de/papers/7319001/2300305/sc9.htm
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