(5457) Queen's

--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: 3.073776997 AU orbital period P: 5.389106133 yr (= 1968.371015 d) eccentricity e: 0.0254785099 perihelion distance q: 2.99546174 AU aphelion distance Q: 3.152092255 AU inclination i: 3.9383205° argument of perihelion ω: 52.894306° ascending node Ω: 269.621513° mean anomaly M: 38.5538648° perihelion passage TP: 2023 Feb 14.199139 Epoch: 2023 Sep 13 data arc: 1948-2023 (3572 obs.) Earth MOID: 1.98363 AU Jupiter Tisserand invariant TJ: 3.226 orbital data, secondary: semimajor axis as: 30 ± 0.7 km (separation) [M23b] separation/primary radius as/rp: 3.0 [*E] separation/Hill radius as/rH: 0.006 [*E] orbital period Ps: 0.57 d [*E] eccentricity es: ? normalized ang. mom. αL: ?

other data, system (combined): absolute mag. H: 12.3 [MPC] slope parameter G: (0.15) [*A] effective diameter dE: 20.55 ± 0.2 km [M**] geometric albedo: 0.048 ± 0.007 [M**] color index U-B: ? color index B-V: ? color index J-H: 0.556 ± 0.055 [LMP] taxonomic type: ? mass m: ? density ρ: (1.6 g/cm3) [*A] Hill radius rH: 4660 km [*E] other data, primary: diameter dp: 20.0 ± 1.1 km [M23b] dimensions : 24.6 x 16.2 km [M23b] axial ratios a/b, b/c: 1.52, ? [*D] rotation period RPp: 4.326 h [W23a] amplitude in mag., rotational ΔM: 0.19 [W23a] pole direction Β, λ: ? , ? other data, secondary: diameter ds: 2.0 ± 0.2 km [M23b] dimensions : 2.0 x 2.0 km [M23b] axial ratios a/b, b/c: 1; ? [*D] diameter ratio ds/dp: 0.1 ± 0.01 [M23b] component mag. difference ΔM: 5.0 ± 0.2 [*D] rotation period RPs: ?