(50142) 2000 AY129

--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: 2.6969122683 AU orbital period P: 4.4290280483 yr (= 1617.7024947 d) eccentricity e: 0.02399226005 perihelion distance q: 2.6322072478 AU aphelion distance Q: 2.7616172888 AU inclination i: 3.28379775° argument of perihelion ω: 204.7956496° ascending node Ω: 162.04827823° mean anomaly M: 65.466818° perihelion passage TP: 2025 Jan 30.817126 Epoch: 2025 Nov 21 data arc: 1998-2025 (2086 obs.) Earth MOID: 1.62793 AU Jupiter Tisserand invariant TJ: 3.366 orbital data, secondary: semimajor axis as: 7.4 km (separation) [K26a] separation/primary radius as/rp: 2.2 [*E] separation/Hill radius as/rH: 0.0054 [*E] orbital period Ps: 0.36 d [*E] eccentricity es: ? normalized ang. mom. αL: ?

other data, system (combined): absolute mag. H: 14.95 [MPC] slope parameter G: (0.15) [*A] effective diameter dE: 6.67 ± 0.27 km [M19a] geometric albedo: 0.057 ± 0.006 [M19a] color index U-B: ? color index B-V: ? taxonomic type: ? mass m: ? density ρ: (1.6 g/cm3) [*A] Hill radius rH: 1400 km [*E] other data, primary: diameter dp: 6.67 ± 0.27 km [M19a] dimensions : ~8.7 x ~5.1 km [*E] axial ratios a/b, b/c: 1.7, ? [*E] rotation period RPp: 18.274 h [JPL] amplitude in mag., rotational ΔM: 0.58 [K26a] pole direction Β, λ: ? , ? other data, secondary: diameter ds: 1.6 ± 0.6 km [K26a] dimensions : 2.2 x 1.2 km [K26a] axial ratios a/b, b/c: 1.8; ? [*D] diameter ratio ds/dp: 0.24 [*D] component mag. difference ΔM: 3.1 [*D] rotation period RPs: ?