equation of time

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equation of time

n.
The difference between time measured from the observed position of the sun and time measured from the position of the mean sun, caused by changes in the earth's orbital speed through the cycle of the seasons. It is the difference between time measured with a sundial and time measured with a clock.

equation of time

n
(Horology) the difference between apparent solar time and mean solar time, being at a maximum in February (over 14 minutes) and November (over 16 minutes)

equa′tion of time′



n.
apparent time minus mean solar time, ranging from minus 14 minutes in February to over 16 minutes in November.
Translations
Zeitgleichung
References in periodicals archive ?
Over the last few years, brands have introduced an increasing number of watches equipped with sky maps, miniature planets, indications of sunrise and sunset times, equations of time and other functions that sometimes result in quite spectacular dials - especially when it comes to wristwatches.
Unless taken from a modern ballistic program using differential equations of time and motion, these "ballpark" indicators are often far enough out of the park to cause misses on medium- to long-range targets, or to miss short-range targets if they are small.
The differential equations of time and motion are solved for each yard along the way until the bullet path reaches the target.