2003 YU179

--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, Cubewano orbital data, primary (osculating elements) [JPL] : semimajor axis a: 46.5414 AU orbital period P: 317.511 yr (= 115973 d) eccentricity e: 0.15548 perihelion distance q: 39.3053 AU aphelion distance Q: 53.7774 AU inclination i: 4.86181° argument of perihelion ω: 326.0992° ascending node Ω: 126.4757° mean anomaly M: 31.1404° perihelion passage TP: 1991 Nov 08.2 Epoch: 2019 Apr 27 data arc: 2003-2018 (28 obs.) Earth MOID: 38.3231 AU Jupiter Tisserand invariant TJ: 5.999 Neptune Tisserand invariant TN: 3.095 [*D] orbital data, secondary: semimajor axis as: 2000 ± 200 km (separation) [G12b] separation/primary radius as/rp: 21 [*E] separation/Hill radius as/rH: 0.0038 [*E] orbital period Ps: 12 d [*E] eccentricity es: ? normalized ang. mom. αL: ?

other data, system (combined): absolute mag. H: 6.5 [MPC] 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: ? taxonomic type: ? mass m: ? density ρ: (1 g/cm3) [*A] Hill radius rH: 530000 km [*E] other data, primary: diameter dp: 193 km [*E] rotation period RPp: ? amplitude in mag., rotational ΔM: ? pole direction Β, λ: ? , ? other data, secondary: diameter ds: 106 km [*E] diameter ratio ds/dp: 0.55 [N09c] component mag. difference ΔM: 1.3 [N09c] rotation period RPs: ?