What does equation of time mean?
Definitions for equation of time
equa·tion of time
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Wikipedia
Equation of time
The equation of time describes the discrepancy between two kinds of solar time. The word equation is used in the medieval sense of "reconcile a difference". The two times that differ are the apparent solar time, which directly tracks the diurnal motion of the Sun, and mean solar time, which tracks a theoretical mean Sun with uniform motion along the celestial equator. Apparent solar time can be obtained by measurement of the current position (hour angle) of the Sun, as indicated (with limited accuracy) by a sundial. Mean solar time, for the same place, would be the time indicated by a steady clock set so that over the year its differences from apparent solar time would have a mean of zero.The equation of time is the east or west component of the analemma, a curve representing the angular offset of the Sun from its mean position on the celestial sphere as viewed from Earth. The equation of time values for each day of the year, compiled by astronomical observatories, were widely listed in almanacs and ephemerides.: 14
Wikidata
Equation of time
The equation of time describes the discrepancy between two kinds of solar time. These are apparent solar time, which directly tracks the motion of the sun, and mean solar time, which tracks a fictitious "mean" sun with noons 24 hours apart. Apparent solar time can be obtained by measurement of the current position of the Sun, or indicated by a sundial. Mean solar time, for the same place, would be the time indicated by a steady clock set so that over the year its differences from apparent solar time average to zero. The equation of time is the east or west component of the analemma, a curve representing the angular offset of the Sun from its mean position on the celestial sphere as viewed from Earth. The equation of time values for each day of the year, compiled by astronomical observatories, were widely listed in almanacs and ephemerides.
Dictionary of Nautical Terms
equation of time
The difference between mean and apparent time, or the acceleration or retardation of the sun's return to the meridian.
Military Dictionary and Gazetteer
equation of time
See Time, Mean Solar Time.
Numerology
Chaldean Numerology
The numerical value of equation of time in Chaldean Numerology is: 5
Pythagorean Numerology
The numerical value of equation of time in Pythagorean Numerology is: 8
Translations for equation of time
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- समय के समीकरणHindi
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"equation of time." Definitions.net. STANDS4 LLC, 2024. Web. 10 May 2024. <https://www.definitions.net/definition/equation+of+time>.
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