Methane ice in the atmosphere most likely covers up the deposits of red tholins on this object, leading to its high albedo, second only to Enceladus in the solar system.
A rotational period of 1.08 earth days for this object was determined using Lomb-Scargle periodograms and measurements by the Swift satellite in the B-band frequency. Methane ice in the atmosphere most likely covers up the deposits of red tholins on this object, leading to its high albedo, second only to Enceladus in the solar system. It lies 44 degrees off the ecliptic, a fact that places it in the scattered disc region and explains its late discovery by Brown, Trujillo, and Rabinowitz. Originally known as UB313, Xena, or Lila, its satellite was jokingly called Gabrielle, but is now known as Dysnomia. The most distant non-comet object in the solar system, for 10 points, identify this object whose 2005 discovery led to the classification of both it and Pluto as "dwarf planets", which is named for the Greek goddess of strife.
A rotational period of 1.08 earth days for this object was determined using Lomb-Scargle periodograms and measurements by the Swift satellite in the B-band frequency.
136199 Eris [or UB313 or Xena or Lila before they are mentioned]