(4868) Knushevia

--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, inner orbital data, primary (osculating elements) [JPL] : semimajor axis a: 1.960501539 AU orbital period P: 2.745053299 yr (= 1002.6496539 d) eccentricity e: 0.068090629 perihelion distance q: 1.82677757 AU aphelion distance Q: 2.094225512 AU inclination i: 22.1026659° argument of perihelion ω: 94.355385° ascending node Ω: 187.534148° mean anomaly M: 157.592422° perihelion passage TP: 2013 Sep 26.08337 Epoch: 2014 Dec 09 data arc: 1983-2015 (741 obs.) Earth MOID: 0.908334 AU Jupiter Tisserand invariant TJ: 3.789 orbital data, secondary: semimajor axis as: 2.1 km [*E] separation/primary radius as/rp: 2.8 [*E] separation/Hill radius as/rH: 0.0097 [*E] orbital period Ps: 0.49675 ± 0.00012 d [W15i] eccentricity es: ? normalized ang. mom. αL: ?

other data, system (combined): absolute mag. H: 14.8 [MPC] slope parameter G: (0.15) [*A] effective diameter dE: 1.535 ± 0.322 km [M11b] geometric albedo: 1 [M11b] color index U-B: ? color index B-V: ? taxonomic type: ? mass m: ? density ρ: (1.6 g/cm3) [*A] Hill radius rH: 220 km [*E] other data, primary: diameter dp: 1.52 ± 0.32 km [*D] rotation period RPp: 3.1422 ± 0.0001 h [W15i] amplitude in mag., rotational ΔM: 0.05 ± 0.01 [W15i] amplitude in mag., mutual events ΔM: 0.02 [W15i] pole direction Β, λ: ? , ? other data, secondary: diameter ds: >0.2 km [*D] diameter ratio ds/dp: >0.13 ± 0.03 [W15i] component mag. difference ΔM: 4.4 [*D] rotation period RPs: 11.922 ± 0.003 h [W15i]