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A Dwarf Planet Class Object in the 21:5 Resonance with Neptune
2018
Astrophysical Journal Letters
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We report the discovery of a H_r = 3.4±0.1 dwarf planet candidate by the Pan-STARRS Outer Solar System Survey. 2010 JO_179 is red with (g-r)=0.88 ± 0.21, roughly round, and slowly rotating, with a period of 30.6 hr. Estimates of its albedo imply a diameter of 600--900 km. Observations sampling the span between 2005--2016 provide an exceptionally well-determined orbit for 2010 JO_179, with a semi-major axis of 78.307±0.009 au, distant orbits known to this precision are rare. We find that 2010
doi:10.3847/2041-8213/aaadb3
fatcat:km3fcvqkjrb6tier5xesxx3tse