Jet Propulsion Laboratory Development Ephemeris information
Jet Propulsion Laboratory Development Ephemeris (abbreviated JPL DE(number), or simply DE(number)) designates one of a series of mathematical models of the Solar System produced at the Jet Propulsion Laboratory in Pasadena, California, for use in spacecraft navigation and astronomy. The models consist of numeric representations of positions, velocities and accelerations of major Solar System bodies, tabulated at equally spaced intervals of time, covering a specified span of years.[1] Barycentric rectangular coordinates of the Sun, eight major planets and Pluto, and geocentric coordinates of the Moon are tabulated.
published by the JetPropulsionLaboratory as DevelopmentEphemeris. The latest releases include DE430 which covers planetary and lunar ephemeris from Dec 21...
William Brown Double planet List of orbits ELP2000 EphemerisJetPropulsionLaboratoryDevelopmentEphemeris Lunar Laser Ranging experiment Milankovitch cycles...
Mars – from various locations. Astronomical unit EphemerisJetPropulsionLaboratoryDevelopmentEphemeris Lunar Laser Ranging experiment Lunar theory On...
The term ephemeris time (often abbreviated ET) can in principle refer to time in association with any ephemeris (itinerary of the trajectory of an astronomical...
twenty-first centuries, modern developments of lunar theory are being used in the JetPropulsionLaboratoryDevelopmentEphemeris series of models of the Solar...
almanacs for 1984 and after, by numerically integrated JetPropulsionLaboratoryDevelopmentEphemeris DE200 (based on the JPL relativistic coordinate time...
from 0 to +4000. Secular variation Shapiro time delay JetPropulsionLaboratoryDevelopmentEphemeris (JPL) ELP-2000 Newcomb's Tables of the Sun Bretagnon...
machine-generated planetary ephemerides. see, for instance, JetPropulsionLaboratoryDevelopmentEphemeris Cowell's method is a special perturbation method; mathematically...
observations, but to the numerical integrations known as the JetPropulsionLaboratoryDevelopmentEphemeris (which includes the Lunar Ephemerides), that in their...
the important DE405 planetary and lunar ephemerides from the JetPropulsionLaboratory. Arguments have been put forward for the continued practical use...
Lew Allen Award for Excellence is a medal of the JetPropulsionLaboratory. Established in 1986 as the Director’s Research Achievement Award; it was then...
collection of data called an ephemeris. NASA's JetPropulsionLaboratory HORIZONS System provides one of several ephemeris computation services. In 1976...
year begins". The mean tropical year in 2000 was 365.24219 ephemeris days, each ephemeris day lasting 86,400 SI seconds. This is 365.24217 mean solar...
"PIA03467: The MGS MOC Wide Angle Map of Mars". Photojournal. NASA / JetPropulsionLaboratory. February 16, 2002. Retrieved December 16, 2012. Ardalan, A. A...
p. 7. Strictly speaking, a major producer of ephemerides, the JetPropulsionLaboratory, uses a time scale they derive, Teph, which is functionally equivalent...
gravity-assists received no later development and was not published until the 1960s. In his 1925 paper "Problems of Flight by JetPropulsion: Interplanetary Flights"...
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