(469505) 2003 FE128

--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, 1:2 resonance orbital data, primary (osculating elements) [JPL] : semimajor axis a: 47.949 AU orbital period P: 332.030 yr (= 121274.0 d) eccentricity e: 0.25251 perihelion distance q: 35.8412 AU aphelion distance Q: 60.057 AU inclination i: 3.38370° argument of perihelion ω: 53.378° ascending node Ω: 169.1866° mean anomaly M: 5.031° perihelion passage TP: 2009 Oct 01 Epoch: 2014 May 23 data arc: 2003-2013 (43 obs.) Earth MOID: 34.8343 AU Jupiter Tisserand invariant TJ: 5.973 Neptune Tisserand invariant TN: 3.07 [*D] orbital data, secondary: semimajor axis as: 2140 ± 50 km (separation) [G12b] separation/primary radius as/rp: 24 [*E] separation/Hill radius as/rH: 0.0045 [*E] orbital period Ps: 14 d [*E] eccentricity es: ? normalized ang. mom. αL: ?

other data, system (combined): absolute mag. H: 6.4 [MPC] 6.74 ± 0.18 [P13c] slope parameter G: (0.15) [*A] effective diameter dE: 221 km [*E] geometric albedo: (0.09 ) [*A] color index U-B: ? color index B-V: ? color index V-R: 0.69 ± 0.06 [P13c] color index V-I: 1.27 ± 0.08 [P13c] taxonomic type: RR (G-mode) [P13c] mass m: ? density ρ: (1 g/cm3) [*A] Hill radius rH: 470000 km [*E] other data, primary: diameter dp: 178 km [*E] rotation period RPp: 5.85 ± 0.15 h [T14a] amplitude in mag., rotational ΔM: 0.5 ± 0.14 [T14a] pole direction Β, λ: ? , ? other data, secondary: diameter ds: 131 km [*E] diameter ratio ds/dp: 0.735 [G12b] component mag. difference ΔM: 0.67 [G12b] rotation period RPs: ?