Special Report

Celestial Mechanics and Dynamical Astronomy

, Volume 98, Issue 3, pp 155-180

First online:

Open Access This content is freely available online to anyone, anywhere at any time.

Report of the IAU/IAG Working Group on cartographic coordinates and rotational elements: 2006

  • P. Kenneth SeidelmannAffiliated withUniversity of Virginia Email author 
  • , B. A. ArchinalAffiliated withU.S. Geological Survey
  • , M. F. A’hearnAffiliated withUniversity of Maryland
  • , A. ConradAffiliated withW. M. Keck Observatory
  • , G. J. ConsolmagnoAffiliated withVatican Observatory
  • , D. HestrofferAffiliated withIMCCE, Paris Observatory, CNRS
  • , J. L. HiltonAffiliated withU.S. Naval Observatory
  • , G. A. KrasinskyAffiliated withInstitute for Applied Astronomy
  • , G. NeumannAffiliated withNASA Goddard Space Flight Center
    • , J. OberstAffiliated withDLR Berlin Adlershof
    • , P. StookeAffiliated withUniversity of Western Ontario
    • , E. F. TedescoAffiliated withUniversity of New Hampshire
    • , D. J. TholenAffiliated withUniversity of Hawaii
    • , P. C. ThomasAffiliated withCornell University
    • , I. P. WilliamsAffiliated withQueen Mary, University of London


Every three years the IAU/IAG Working Group on Cartographic Coordinates and Rotational Elements revises tables giving the directions of the poles of rotation and the prime meridians of the planets, satellites, minor planets, and comets. This report introduces improved values for the pole and rotation rate of Pluto, Charon, and Phoebe, the pole of Jupiter, the sizes and shapes of Saturn satellites and Charon, and the poles, rotation rates, and sizes of some minor planets and comets. A high precision realization for the pole and rotation rate of the Moon is provided. The expression for the Sun’s rotation has been changed to be consistent with the planets and to account for light travel time


Cartographic coordinates Rotation axes Rotation periods Sizes Shapes Planets Satellites Minor planets Comets