The creation of modern ephemerides involves the fitting to a wide variety
of astronomical measurements (observations).
This page presents the sets of observations that are currently being used
in the creation and improvement of modern planetary and lunar ephemerides.
These data are currently maintained by
Ryan Park
; JPL/Caltech
(
ryan.s.park@jpl.nasa.gov
).
Meridian Circle Timings (transits)
- iBordeaux, 1985-96
- RGO, Herstmonceux,1957-82
- RGO, La Palma, 1984-98
- Tokyo, 1986-88
- USNO 6″, 1913-76
- USNO 6″, 1977-82
- USNO 6″, 1986-93
- USNO 9″, 1913-25, 1935-45
Photographic Astrometry of Outer Planets and Satellites
Photographic Astrometry of Pluto
CCD Astrometry of Outer Planets and Satellites
Astrolabe Observations
Radar Ranging from Eupatoria, Crimea
Radar Ranging from Goldstone, California
- Mercury, 1967-97
- Venus, 1967-90
Spacecraft Encounter Estimates
Right ascension, declination and range estimates from spacecraft encounters with tracking data (Doppler, range, and VLBI) re-reduced in ICRF frame.
Spacecraft VLBI
Data from Magellan, Venus Express at Venus, Phobos, Mars Global Surveyor, Odyssey, Mars Reconnaisance Orbiter at Mars, and Galileo at Jupiter.
Mercury Spacecraft Range
Venus Spacecraft Doppler
Mars Spacecraft Ranging
Mars Spacecraft Doppler (Differenced Range)
Juno Spacecraft Range
Cassini Spacecraft Range
DSN Station Locations
Lunar Laser Ranging
These data are provided by the
International Laser Ranging Service
.