(199145) 2005 YY128

--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: NEA, Apollo (PHA) orbital data, primary (osculating elements) [JPL] : semimajor axis a: 1.6494042506 AU orbital period P: 2.1183556059 yr (= 773.7293851 d) eccentricity e: 0.731381246 perihelion distance q: 0.443060915 AU aphelion distance Q: 2.8557475858 AU inclination i: 3.7573881° argument of perihelion ω: 314.875295° ascending node Ω: 300.22136° mean anomaly M: 342.47151053° perihelion passage TP: 2023 Apr 03.6730761 Epoch: 2023 Feb 25 data arc: 2005-2023 (493 obs.) Earth MOID: 0.0294205 AU Jupiter Tisserand invariant TJ: 3.921 orbital data, secondary: semimajor axis as: ? orbital period Ps: ? eccentricity es: ? normalized ang. mom. αL: ?

other data, system (combined): absolute mag. H: 18.32 [MPC] slope parameter G: (0.15) [*A] effective diameter dE: 0.53 km [*E] geometric albedo: 0.3 [*D] color index U-B: ? color index B-V: ? taxonomic type: ? mass m: ? density ρ: (1.6 g/cm3) [*A] Hill radius rH: 17 km [*E] other data, primary: diameter dp: 0.45 km [*E] rotation period RPp: ? amplitude in mag., rotational ΔM: ? pole direction Β, λ: ? , ? other data, secondary: diameter ds: 0.3 km [*E] diameter ratio ds/dp: 0.67 [*D] component mag. difference ΔM: 0.9 [*D] rotation period RPs: ?