(13166) 1995 WU1

--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: 2.42396450355 AU orbital period P: 3.773962547 yr (= 1378.43982028 d) eccentricity e: 0.06135701876 perihelion distance q: 2.275237268 AU aphelion distance Q: 2.57269173906 AU inclination i: 11.704210496° argument of perihelion ω: 71.42442205° ascending node Ω: 43.72422893° mean anomaly M: 291.4460328° perihelion passage TP: 2026 Aug 10.4931062 Epoch: 2025 Nov 21 data arc: 1976-2025 (4702 obs.) Earth MOID: 1.32084 AU Jupiter Tisserand invariant TJ: 3.481 orbital data, secondary: semimajor axis as: 16 km [*E] separation/primary radius as/rp: 4.7 [*E] separation/Hill radius as/rH: 0.013 [*E] orbital period Ps: 1.1021 ± 0.0004 d [D25e] eccentricity es: ? normalized ang. mom. αL: ?

other data, system (combined): absolute mag. H: 12.67 [MPC] slope parameter G: (0.15) [*A] effective diameter dE: 7.08 ± 0.39 km [M19a] geometric albedo: 0.352 ± 0.025 [M19a] color index U-B: ? color index B-V: ? taxonomic type: ? mass m: ? density ρ: (1.6 g/cm3) [*A] Hill radius rH: 1200 km [*E] other data, primary: diameter dp: 6.76 ± 0.37 km [*D] dimensions : ~7.6 x ~6.0 km [*E] axial ratios a/b, b/c: 1.3, ? [*E] rotation period RPp: 3.8101 ± 0.0002 h [D25e] amplitude in mag., rotational ΔM: 0.25 [D25e] amplitude in mag., mutual events ΔM: 0.1 [D25e] pole direction Β, λ: ? , ? other data, secondary: diameter ds: 2.10 ± 0.18 km [*D] diameter ratio ds/dp: 0.31 ± 0.02 [D25e] component mag. difference ΔM: 2.54 ± 0.14 [*D] rotation period RPs: ?