The Orbits of Neptune's Outer Satellites

Details The Orbits of Neptune's Outer Satellites The Orbits of Neptune's Outer Satellites

Apr 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aj....141..135b&link_type=abstract

The Astronomical Journal, Volume 141, Issue 4, article id. 135 (2011).

Astronomy and Astrophysics

Astronomy

Astrometry, Celestial Mechanics, Ephemerides, Planets And Satellites: General, Planets And Satellites: Individual: Neptune

Scientific paper

In 2009, we used the Subaru telescope to observe all the faint irregular satellites of Neptune for the first time since 2004. These observations extend the data arcs for Halimede, Psamathe, Sao, Laomedeia, and Neso from a few years to nearly a decade. We also report on a search for unknown Neptune satellites in a half-square degree of sky and a limiting magnitude of 26.2 in the R band. No new satellites of Neptune were found. We numerically integrate the orbits for the five irregulars and summarize the results of the orbital fits in terms of the state vectors, post-fit residuals, and mean orbital elements. Sao and Neso are confirmed to be Kozai librators, while Psamathe is a "reverse circulator." Halimede and Laomedeia do not seem to experience any strong resonant effects.

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