Tidal evolution of Dysnomia, satellite of the dwarf planet Eris

Details Tidal evolution of Dysnomia, satellite of the dwarf planet Eris Tidal evolution of Dysnomia, satellite of the dwarf planet Eris

Apr 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008icar..194..847g&link_type=abstract

Icarus, Volume 194, Issue 2, p. 847-849.

Physics

2

Scientific paper

The past tidal evolution of the satellite Dysnomia of the dwarf planet Eris can be inferred from the current physical and orbital properties of the system. Preliminary considerations, which assumed a circular orbit for the satellite, suggested that the satellite formed close to the planet, perhaps as a result of a giant impact, and that it is thus unlikely that smaller satellites lie further out. However, if the satellite's orbit is eccentric, even if the eccentricity is very small, a qualitatively different past tidal evolution may be indicated. Early in the Solar System's history, the satellite may have been on a highly eccentric orbit much farther from the planet than it is now, suggestive of a capture origin. Additional satellites farther out cannot be ruled out.

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