(554099) 2012 KU50

--Orbital and physical data--

(See this page for definitions of quantities; source codes in brackets, see this link for full references; *A, *D, and *E indicate assumed, derived, and estimated values, respectively.)

dynamical type, primary: TNO, 5:8 resonance orbital data, primary (osculating elements) [JPL] : semimajor axis a: 40.77187 AU orbital period P: 260.3449 yr (= 95091 d) eccentricity e: 0.244171 perihelion distance q: 30.81658 AU aphelion distance Q: 50.7272 AU inclination i: 18.893699° argument of perihelion ω: 126.0813° ascending node Ω: 66.759423° mean anomaly M: 29.4953° perihelion passage TP: 2003 Jun 19.06 Epoch: 2024 Oct 17 data arc: 2002-2024 (297 obs.) Earth MOID: 29.8537 AU Jupiter Tisserand invariant TJ: 5.264 Neptune Tisserand invariant TN: 2.874 [*D] orbital data, secondary: semimajor axis as: 20400 ± 800 km [G25c] separation/primary radius as/rp: 280 [*E] separation/Hill radius as/rH: 0.055 [*E] orbital period Ps: 622 ± 3 d [G25c] eccentricity es: 0.68 ± 0.04 [G25c] normalized ang. mom. αL: ?

other data, system (combined): absolute mag. H: 6.32 [MPC] slope parameter G: (0.15) [*A] effective diameter dE: 204 km [*E] geometric albedo: (0.126 ) [*A] color index U-B: ? color index B-V: ? taxonomic type: ? mass m: 1.7x1018 ± 2x1017 kg [G25c] density ρ: (1 g/cm3) [*A] Hill radius rH: 370000 km [*E] other data, primary: diameter dp: 144 km [*E] rotation period RPp: ? amplitude in mag., rotational ΔM: ? pole direction Β, λ: ? , ? other data, secondary: diameter ds: 144 km [*E] diameter ratio ds/dp: 1.0 [*D] component mag. difference ΔM: 0.0 [G22b] rotation period RPs: ?