The creation of modern ephemerides involves the fitting
to a wide variety of astronomical measurements (observations).
This website presents the sets of observations that are currently being used in creation and improvement of modern planetary and lunar ephemerides.
This page is currently maintained by
Present Home Page for the IAU Commission 4 (Ephemerides) : "http://iaucom4.org/ephemerides.html"
Right ascension, declination and range estimates
from spacecraft encounters with tracking data
(Doppler, range, and VLBI) re-reduced in ICRF frame.
Spacecraft 3-D Observations Format
Magellan, Venus Express at Venus
Phobos, Mars Global Surveyor, Odyssey, Mars Reconnaisance Orbiter at Mars
Galileo at Jupiter
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