Size, density, albedo and atmosphere limit of Eris from a stellar occultation
نویسندگان
چکیده
We report the observation of a multi-chord stellar occultation by the dwarf planet (136199) Eris. The event was observed on November 6, 2010 UT, from two sites in Chile. Our observation is consistent with a spherical Eris with radius RE=1163±6 km, density ρ=2.52±0.05 g cm−3, and visible geometric albedo pV=0.96 −0.04. Besides being remarkably similar in size to Pluto, Eris appears as one of the intrinsically brightest objects of the solar system, with a density suggesting a mainly rocky rocky interior. Upper limits of about 1 nbar are derived for the surface pressure of possible nitrogen, argon or methane atmospheres of the dwarf planet.
منابع مشابه
Size, density, albedo and atmosphere limit of dwarf planet Eris from a stellar occultation
We report the observation of a multi-chord stellar occultation by the dwarf planet (136199) Eris. The event was observed on November 6, 2010 UT, from two sites in Chile. Our observation is consistent with a spherical Eris with radius RE=1163±6 km, density ρ=2.52±0.05 g cm−3, and visible geometric albedo pV=0.96 −0.04. Besides being remarkably similar in size to Pluto, Eris appears as one of the...
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