2004 KB19

--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, plutino orbital data, primary (osculating elements) [JPL] : semimajor axis a: 39.782 AU orbital period P: 250.917 yr (= 91649.3 d) eccentricity e: 0.22044 perihelion distance q: 31.013 AU aphelion distance Q: 48.552 AU inclination i: 17.11647° argument of perihelion ω: 284.646° ascending node Ω: 43.91737° mean anomaly M: 304.36° perihelion passage TP: 2057 Jan 02 Epoch: 2018 Mar 23 data arc: 2004-2015 (19 obs.) Earth MOID: 30.044 AU Jupiter Tisserand invariant TJ: 5.286 Neptune Tisserand invariant TN: 2.900 [*D] orbital data, secondary: semimajor axis as: 3400 km (separation) [N18a] separation/primary radius as/rp: 64 [*E] separation/Hill radius as/rH: 0.013 [*E] orbital period Ps: 52 d [*E] eccentricity es: ? normalized ang. mom. αL: ?

other data, system (combined): absolute mag. H: 7.4 [MPC] slope parameter G: (0.15) [*A] effective diameter dE: 146 km [*E] geometric albedo: (0.09 ) [*A] color index U-B: ? color index B-V: ? taxonomic type: ? mass m: ? density ρ: (1 g/cm3) [*A] Hill radius rH: 270000 km [*E] other data, primary: diameter dp: 106 km [*E] rotation period RPp: ? amplitude in mag., rotational ΔM: ? pole direction Β, λ: ? , ? other data, secondary: diameter ds: 100 km [*E] diameter ratio ds/dp: 0.95 ± 0.03 [*D] component mag. difference ΔM: 0.11 ± 0.06 [N18a] rotation period RPs: ?