(6186) Zenon and two satellites

--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: 2.3791444008 AU orbital period P: 3.669705418 yr (= 1340.3852189 d) eccentricity e: 0.184198265 perihelion distance q: 1.94091013 AU aphelion distance Q: 2.817378671 AU inclination i: 4.2103976° argument of perihelion ω: 86.43441° ascending node Ω: 315.448074° mean anomaly M: 29.554024° perihelion passage TP: 2016 Oct 28.961729 Epoch: 2017 Feb 16 data arc: 1966-2016 (1253 obs.) Earth MOID: 0.955066 AU Jupiter Tisserand invariant TJ: 3.513 orbital data, secondary: semimajor axis as: 9.1 km [*E] separation/primary radius as/rp: 3.1 [*E] separation/Hill radius as/rH: 0.010 [*E] orbital period Ps: 0.5997 d [W17a] eccentricity es: ? normalized ang. mom. αL: ? orbital data, secondary: semimajor axis as: ? separation/primary radius as/rp: ? separation/Hill radius as/rH: ? orbital period Ps: ? eccentricity es: ? normalized ang. mom. αL: ?

other data, system (combined): absolute mag. H: 13.7 [MPC] slope parameter G: (0.15) [*A] effective diameter dE: 6 km [*E] geometric albedo: color index U-B: ? color index B-V: ? taxonomic type: ? mass m: ? density ρ: (1.6 g/cm3) [*A] Hill radius rH: 880 km [*E] other data, primary: diameter dp: 5.8 km [*E] rotation period RPp: 2.6832 h [W17a] amplitude in mag., rotational ΔM: 0.08 [W17a] pole direction Β, λ: ? , ? other data, secondary: diameter ds: 1.6 km [*E] diameter ratio ds/dp: 0.28 [W17a] component mag. difference ΔM: ? rotation period RPs: 3.2987 h [W17a] other data, tertiary: diameter ds: ? diameter ratio ds/dp: ? component mag. difference ΔM: ? rotation period RPs: ?