(29168) 1990 KJ

--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: main belt asteroid orbital data, primary (osculating elements) [JPL] : semimajor axis a: 2.308312031 AU orbital period P: 3.507114743 yr (= 1280.97366 d) eccentricity e: 0.177908745 perihelion distance q: 1.897643135 AU aphelion distance Q: 2.718980928 AU inclination i: 24.21973879° argument of perihelion ω: 180.4483007° ascending node Ω: 93.67671632° mean anomaly M: 277.306461° perihelion passage TP: 2015 Mar 13.24512 Epoch: 2014 May 23 data arc: 1990-2014 (858 obs.) Earth MOID: 0.880922 AU Jupiter Tisserand invariant TJ: 3.45 orbital data, secondary: semimajor axis as: 13 km [*E] separation/primary radius as/rp: 5.8 [*E] separation/Hill radius as/rH: 0.019 [*E] orbital period Ps: 1.486 ± 0.0008 d [S18f] eccentricity es: ? normalized ang. mom. αL: ?

other data, system (combined): absolute mag. H: 13.4 [MPC] slope parameter G: (0.15) [*A] effective diameter dE: 4.93 ± 0.34 km [M11b] geometric albedo: 0.348 ± 0.06 [M11b] color index U-B: ? color index B-V: ? taxonomic type: ? mass m: ? density ρ: (1.6 g/cm3) [*A] Hill radius rH: 690 km [*E] other data, primary: diameter dp: 4.58 ± 0.32 km [*E] geometric albedo : 0.348± 0.06[M11b] rotation period RPp: 2.58247 ± 0.00003 h [P22c] amplitude in mag., rotational ΔM: 0.14 [P22c] amplitude in mag., mutual events ΔM: 0.2 [S18f] pole direction Β, λ: ? , ? other data, secondary: diameter ds: >1.83 km [*E] diameter ratio ds/dp: >0.4 [*E] component mag. difference ΔM: <1.99 [*E] rotation period RPs: 34.4 h [P22c]