The Orbits of the Neptunian Satellites and the Orientation of the Pole of Neptune

Details The Orbits of the Neptunian Satellites and the Orientation of the Pole of Neptune The Orbits of the Neptunian Satellites and the Orientation of the Pole of Neptune

May 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008dda....39.1504j&link_type=abstract

American Astronomical Society, DDA meeting #39, #15.04

Astronomy and Astrophysics

Astronomy

Scientific paper

Our previous ephemerides for the Neptunian satellites (Triton and Nereid) and our Neptune pole orientation were produced at the time of the Voyager Neptune encounter (Jacobson et al. 1991, A&A 247, 565). That work was done in the B1950 reference system. Since then we have amassed a quantity of high quality Earthbased observations of the satellites. We have also reconstructed the Voyager trajectory in the International Celestial Reference Frame (ICRF). This paper reports on an update to the satellite orbits and Neptune pole based on re-fitting all of the observations used previously together with those acquired through the opposition of 2007. We now include Proteus in our satellite system as it was used for an optical navigation target in the Voyager reconstruction. The new orbits and pole are referred to the ICRF. When processing the Voyager observations we use the new ICRF Voyager trajectory.

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