(469420) 2001 XP254

--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, 3:5 resonance orbital data, primary (osculating elements) [JPL] : semimajor axis a: 42.564 AU orbital period P: 277.696 yr (= 101428.4 d) eccentricity e: 0.22369 perihelion distance q: 33.0426 AU aphelion distance Q: 52.085 AU inclination i: 2.60021° argument of perihelion ω: 181.125° ascending node Ω: 304.9353° mean anomaly M: 359.217° perihelion passage TP: 2014 Dec 29 Epoch: 2014 May 23 data arc: 2001-2013 (22 obs.) Earth MOID: 32.0579 AU Jupiter Tisserand invariant TJ: 5.692 Neptune Tisserand invariant TN: 3.02 [*D] orbital data, secondary: semimajor axis as: 1200 ± 100 km (separation) [G12b] separation/primary radius as/rp: 22 [*E] separation/Hill radius as/rH: 0.0046 [*E] orbital period Ps: 12 d [*E] eccentricity es: ? normalized ang. mom. αL: ?

other data, system (combined): absolute mag. H: 7.6 [MPC] slope parameter G: (0.15) [*A] effective diameter dE: 133 km [*E] geometric albedo: (0.09 ) [*A] color index U-B: ? color index B-V: 1.09 [S12f] color index V-R: 0.62 ± 0.03 [S12f] color index B-R: 1.71 ± 0.04 [S12f] color index V-I: 1.22 [S12f] taxonomic type: ? mass m: ? density ρ: (1 g/cm3) [*A] Hill radius rH: 260000 km [*E] other data, primary: diameter dp: 108 km [*E] rotation period RPp: ? amplitude in mag., rotational ΔM: ? pole direction Β, λ: ? , ? other data, secondary: diameter ds: 77 km [*E] diameter ratio ds/dp: 0.711 [G12b] component mag. difference ΔM: 0.74 [G12b] rotation period RPs: ?