Sidereal time ("sidereal" pronounced /saɪˈdɪəriəl, sə-/ sy-DEER-ee-əl, sə-) is a system of timekeeping used especially by astronomers. Using sidereal...

up sidereal in Wiktionary, the free dictionary. Sidereal, meaning "of the stars", may refer to: Sidereal time Sidereal day Sidereal month Sidereal year...

Anti-sidereal time and extended-sidereal time are artificial time standards used to analyze the daily variation in the number of cosmic rays received on...

A sidereal year (/saɪˈdɪəri.əl/, US also /sɪ-/; from Latin sidus 'asterism, star'), also called a sidereal orbital period, is the time that Earth or another...

minutes 56 seconds longer than a mean sidereal day, or 1⁄366 more than a mean sidereal day. In astronomy, sidereal time is used to predict when a star will...

types of time reckoning based on astronomical observations: apparent solar time and mean solar time (discussed in this article), and sidereal time, which...

time standards such as sidereal time and ephemeris time, for most practical purposes, by newer time standards based wholly or partly on atomic time using...

standard unit (SI units) for science. Celestial sphere-based: as in sidereal time, where the apparent movement of the stars and constellations across...

the local sidereal time, α object {\displaystyle \alpha _{\text{object}}} is the object's right ascension, GST is Greenwich sidereal time and λ observer...

Rotation period – time that it takes to complete one revolution around its axis of rotation Satellite revisit period Sidereal time Sidereal year Opposition...

called mean sidereal time; if the true equinox is used (the actual location of the equinox at a given instant), it is called apparent sidereal time. The difference...

In astrology, sidereal and tropical are terms that refer to two different systems of ecliptic coordinates used to divide the ecliptic into twelve "signs"...

star it is orbiting, and is the basis of solar time. The synodic day is distinguished from the sidereal day, which is one complete rotation in relation...

Rotation Angle (ERA, which serves as the replacement for Greenwich Mean Sidereal Time). UT1 is the same everywhere on Earth. UT1 is required to follow the...

equation of time for that date. A third method did not use the equation of time; instead, it used stellar observations to give sidereal time, exploiting...

Hours, minutes and seconds of sidereal time (3 functions) Time of sunset and sunrise (2 functions) Equation of time Perpetual calendar Days of the month...

orbits the Sun once a year, the sidereal time at any given place and time will gain about four minutes against local civil time, every 24 hours, until, after...

time of a solar day, while reoccurring every sidereal day. The remaining small changes in the culmination period time from sidereal year to sidereal year...

realizations Nautical time Sidereal time Ramirez-Simon, Diana (2024-04-03). "Moon Standard Time? Nasa to create lunar-centric time reference system". the...

the sky. An object's right ascension and the local sidereal time can be used to determine the time of its culmination (see hour angle). The term meridian...

value of its turning number. The paradox is related to sidereal time: a sidereal day is the time Earth takes to rotate for a distant star to return to...

Southern Hemisphere. In astronomy, the March equinox is the zero point of sidereal time and, consequently, the right ascension and ecliptic longitude. It also...

apparent retrograde motion/planetary stations, planetary ingresses, sidereal time, positions for the mean and true nodes of the moon, the phases of the...

intersects the celestial equator. Right ascension is usually measured in sidereal hours, minutes and seconds instead of degrees, a result of the method of...

on the/at its meridian (at its apparent highest point) 18.5 sidereal hours later. Sidereal hour angle, used in celestial navigation, is similar to right...

date of Easter, time of sunrise, equation of time, sidereal time, and many other indicators. 1,728 unique parts allow sidereal time, a 2,800 star chart...

definitions. The first one corresponds to the sidereal rotation period (or sidereal day), i.e., the time that the object takes to complete a full rotation...

unsatisfactory as a unit of time by reason of its variability, the unit adopted should be the sidereal year at 1900.0, that the time reckoned in this unit be...

astronomers to use the stars to measure sidereal time, which provided an accurate method for setting clocks. The equation of time was engraved on sundials so that...

position of the Sun on the ecliptic and the current zodiac sign, the sidereal time, and other astronomical data such as the Moon's nodes for indicating...