[IAU logo here]

IAU Commission 4

Topics Related to Ephemerides


Recent Papers and Information Related to Ephemerides

Documentation of JPL's DE403 and DE405

The St. Petersburg Institute of Applied Astronomy's EPM series of ephemerides

IAU List of Current Best Estimates of Astronomical Constants

Relations Between the Astronomical Times, ET, TDB, TCB, TT, TAI UTC, etc.

Frequently Asked Questions about Astronomical Phenomena

ICRS : International Celestial Reference System

IERS Standards (International Earth Rotation Service)

USNO Circular 179

Asteroid Perturbations

Lunar Laser Ranging

Relativity Tests, etc.


Documentation of JPL's DE403 and DE405

* de403iom/ "The JPL Planetary and Lunar Ephemerides, DE403/LE403"

[in TeX ("de403iom.tex") or pdf ("de403iom.pdf")
or PostScript ("de403iom.ps") with separate PostScript figures ("figx.ps")] * de405iom/ "The JPL Planetary and Lunar Ephemerides, DE405/LE405"

[in PostScript ("de405iom.ps") or pdf ("de405iom.pdf")
or in LaTeX ("de405iom.tex") with associated PostScript figures ("de405figx.ps")] * XSChap8.pdf "Detailed Description of the JPL Planetary and Lunar Ephemerides, DE405/LE405"


The St. Petersburg Institute of Applied Astronomy's EPM2000 and EPM2004

* EPM2000/ A description of EPM2000, from the IAA in St. Petersburg

[in PostScript ("EPM2000.PS") with separate PostScript figures
("FIG1.PS","FIG2-3.PS","FIG4-5.PS",
"FIG6-7.PS","FIG8.PS","FIG9-12.PS","FIG13-17.PS")] * EPM2004.pdf A description of EPM2004, the latest from the IAA: "High-precision ephemerides of planets - EPM and determination of some astronomical constants" by E V Pitjeva


IAU List of Current Best Estimates of Astronomical Constants

* iausgnsrpt.ps * iausgnsrpt.pdf "Report of the IAU WGAS Sub-group on Numerical Standards"

Relations Between the Astronomical Times (ET, TDB, TCB, TT, TAI UTC, etc.)

* timescales.ps * timescales.pdf "Time Scales in the JPL and CfA Ephemerides" by E M Standish [in PostScript ("timescales.ps") or PDF ("timescales.pdf")] * time-eph.ps "A numerical time ephemeris of the Earth" by A W Irwin and T Fukushima [in PostScript ("time-eph.ps")]

Frequently Asked Questions about Astronomical Phenomena

* http://aa.usno.navy.mil/aa/faq/ The Naval Observatory's descriptions about Phenomena, Time, Calendars, etc.

ICRS : International Celestial Reference System

* http://aa.usno.navy.mil/AA/faq/docs/ICRS_doc.html Narrative about the ICRS * http://aa.usno.navy.mil/AA/data/docs/ICRS_links.html List of important ICRS-related links

IERS Standards (International Earth Rotation Service)

* http://maia.usno.navy.mil/conv2003.html or * http://tai.bipm.org/iers/conv2003/conv2003.html IERS Conventions 2003

USNO Circular 179 :

* http://aa.usno.navy.mil/kaplan/Circular.html IAU Resolutions on Astronomical Reference Systems, Time Scales, and Earth Rotation Models

Asteroid Perturbations

* EMSAGF.pdf "Accuracy limit of modern ephemerides imposed by the uncertainties in asteroid masses" by E.M.Standish and A.G.Fienga * PBAGFJLS.pdf "Analytical and numerical studies of asteroid perturbations on solar system planet dynamics" by P.Bretagnon, A.G.Fienga, and J.-L.Simon * KPVY.pdf "Hidden mass in the asteroid belt" by G.A.Krasinsky, E.V.Pitjeva, M.V.Vasilyev and E.I.Yagudina"

Lunar Laser Ranging

* GAK.pdf "Selenodynamical parameters from analysis of LLR observations 1970-2001" by G.A.Krasinsky * JGWDHBJTR.pdf "Lunar Fluid Core and Solid-Body Tides" by J.G.Williams, D.H.Boggs, and J.T.Ratcliff

Relativity Tests, etc.

* JGWSGTDHB.pdf "Progress in Lunar Laser Ranging Tests of Relativistic Gravity" by J.G.Williams, S.G.Turyshev, and D.H.Boggs * GAKVAB.pdf "Secular increase of astronomical unit from analysis of the major planet motions, and its interpretation" by G.A.Krasinsky and V.A.Brumberg
Return Home