[hst5]

--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 orbital data, primary (osculating elements) [F10b] : semimajor axis a: 42.9 AU orbital period P: 280 yr (= 102000 d) eccentricity e: ? perihelion distance q: ? AU aphelion distance Q: ? AU inclination i: 3.5° argument of perihelion ω: ?° ascending node Ω: ?° mean anomaly M: ?° perihelion passage TP: ? Epoch: N/A data arc: 2005 Aug 3 (3 obs.) Earth MOID: ? AU Jupiter Tisserand invariant TJ: ? orbital data, secondary: semimajor axis as: 16400 ± 1600 km (separation) [F10b] separation/primary radius as/rp: 240 [*E] separation/Hill radius as/rH: 0.034 [*E] orbital period Ps: 1000 d [*E] eccentricity es: ? normalized ang. mom. αL: ?

other data, system (combined): absolute mag. H: 0 [MPC] 6.8 ± 0.3 [F10b] slope parameter G: (0.15) [*A] effective diameter dE: 190 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: 500000 km [*E] other data, primary: diameter dp: 135 km [*E] rotation period RPp: ? amplitude in mag., rotational ΔM: ? pole direction Β, λ: ? , ? other data, secondary: diameter ds: 135 km [*E] diameter ratio ds/dp: 1.0 [*D] component mag. difference ΔM: 0.1 [F10b] rotation period RPs: ?