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 ?
A stunning piece of art front and back, this incredible piece displays hours, minutes, perpetual calendar, day/night indication, precision moonphase, age of the moon, running equation of time, sunrise and sunset, length of day and night, seasons, solstices, equinoxes and zodiacal signs, tide level indicator, Sun-Earth-Moon conjunction, opposition and quadrature, transparent celestial chart of the Northern Hemisphere with indication of the Milky Way, the ecliptic and the celestial equator, celestial time hours and minutes, tourbillon, 3-week power reserve (using 6 barrels), and power reserve indication.
In comparison, my 10-inch model is precise to the minute, after taking into account the equation of time and making a correction for longitude (both of which are engraved on the back).
Panerai watches are priced from 4,800 euros to a whopping 165,000 euros for the brand's flagship Luminor 1950 Tourbillon Equation of Time, which indicates sunrise and sunset times for the city chosen by the purchaser and is made with precious metals.
Garvan Donnelly, trainer of Equation Of Time He got 8lb for winning last time out but I think he's progressive.
In 2010, Halter even created the Classic Janvier watch featuring the time, the moon cycle and the equation of time, to pay tribute to the master.
On the East and West sides of the plinth there are stainless steel plaques explaining the origin of the Equation of Time, or time correction value, and graphically depicting it as follows:
15: CARDINAL PALACE (J A Heffernan, 14-1) 1; Paene Magnus (7-2f) 2; Equation Of Time (16-1) 3.
Only 30 of these special Panerai watches will be made and each client may choose exact coordinates for which the sunrise, sunset, and equation of time complications may be customised.
Platinum, considered to be the most precious of metals, has been chosen by Vacheron Constantin, another of the old haute horlogerie houses--with 255 years of watchmaking to their name--to encase the very complicated movements of the three Patrimony Traditionnelle models introduced in 2010; the Patrimony Traditionnelle Calibre 2253 includes astronomical complications such as the perpetual calendar, the times of sunrise and sunset and the equation of time.
2005 with tourbillon and the Luminor 1950 Equation of Time Tourbillon Titanio -- 50 mm (PAM00365), the most technically sophisticated wristwatch ever produced by Officine Panerai and a tribute to the genius of Galileo Galilei.
Equation of time is the difference between apparent solar time and mean solar time.
We also need to know two astronomical measures called the declination angle of the sun (5) and the real time-mean time difference, also known as the equation of time (T).