- mean longitude
- средняя долгота
English-Russian cartography dictionary. 2013.
mean longitude
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Mean longitude — In astrodynamics or celestial dynamics, mean longitude is the longitude at which an orbiting body could be found if its orbit were circular, and free of perturbations, and if its inclination were zero. Both the mean longitude and the true… … Wikipedia
sun's mean longitude — noun : the geocentric celestial longitude which the sun would have if its apparent annual motion in the ecliptic were at a uniform average or mean angular velocity … Useful english dictionary
Mean anomaly — In celestial mechanics, the mean anomaly is a parameter relating position and time for a body moving in a Kepler orbit. It is based on the fact that equal areas are swept at the focus in equal intervals of time. The mean anomaly increases… … Wikipedia
Longitude of the periapsis — In astrodynamics, the longitude of the periapsis (symbolized varpi) of an orbiting body is the longitude (measured from the point of the vernal equinox) at which the periapsis (closest approach to the central body) would occur if the body s… … Wikipedia
Longitude — For Dava Sobel s book about John Harrison, see Longitude (book). For the adaptation of Sobel s book, see Longitude (TV series). Map of Earth Longitude (λ) Lines of longitude appear vertical with varying curvature in this projection, but are… … Wikipedia
Greenwich Mean Time — (GMT) is a term originally referring to mean solar time at the Royal Observatory in Greenwich, London. It is now often used to refer to Coordinated Universal Time (UTC) when this is viewed as a time zone, although strictly UTC is an atomic time… … Wikipedia
Biel Mean Time — Heure Internet Pour les articles homonymes, voir SIT. La dernière fois que vous avez rafraîchi la page il était 04:55 UTC, soit : .be … Wikipédia en Français
Greenwich Mean Time — ➡ GMT. * * * the name for mean solar time of the longitude (0°) of the Royal Greenwich Observatory in England. The meridian at this longitude is called the prime meridian or Greenwich meridian. Greenwich Mean Time was used for clearly … Universalium
History of longitude — The history of longitude is a record of the effort, by navigators and scientists over several centuries, to discover a means of determining longitude. The measurement of longitude is important to both cartography and navigation. Historically, the … Wikipedia
Local mean time — is a form of solar time that corrects the variations of local apparent time, forming a uniform time scale at a specific longitude. Its uniformity depends only on the accuracy of the clocks used to measure it.Local mean time was used from the… … Wikipedia
Greenwich (mean) time — or Greenwich time n. mean solar time of the meridian (0° longitude) at Greenwich, England: see also COORDINATED UNIVERSAL TIME, UNIVERSAL TIME * * * … Universalium
