Discovery of a Satellite of the Large Trans-Neptunian Object (225088) 2007 OR10

  title={Discovery of a Satellite of the Large Trans-Neptunian Object (225088) 2007 OR10},
  author={Cs. Kiss and G{\'a}bor Marton and Anik'o Farkas-Tak'acs and J. Stansberry and Thomas G. Muller and J'ozsef Vink'o and Zolt'an Balog and Jos{\'e} Luis Ortiz and Andr'as P'al},
  journal={The Astrophysical Journal},
2007 OR10 is currently the third largest known dwarf planet in the trans-Neptunian region, with an effective radiometric diameter of ~1535 km. It has a slow rotation period of ~45 hr that was suspected to be caused by tidal interactions with a satellite undetected at that time. Here, we report on the discovery of a likely moon of 2007 OR10, identified on archival Hubble Space Telescope WFC3/UVIS system images. Although the satellite is detected at two epochs, this does not allow an unambiguous… Expand

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