(82256) 2001 KM8

--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: 2.3134857172 AU orbital period P: 3.518912243 yr (= 1285.2826967 d) eccentricity e: 0.2487619955 perihelion distance q: 1.7379783936 AU aphelion distance Q: 2.8889930408 AU inclination i: 23.85975499° argument of perihelion ω: 317.26275574° ascending node Ω: 62.85271874° mean anomaly M: 2.3904377° perihelion passage TP: 2023 Sep 04.4655882 Epoch: 2023 Sep 13 data arc: 2000-2023 (3015 obs.) Earth MOID: 0.794391 AU Jupiter Tisserand invariant TJ: 3.43 orbital data, secondary: semimajor axis as: 13 km [*E] separation/primary radius as/rp: 6.7 [*E] separation/Hill radius as/rH: 0.024 [*E] orbital period Ps: 1.7988 ± 0.0025 d [W24a] eccentricity es: ? normalized ang. mom. αL: ?

other data, system (combined): absolute mag. H: 14.22 [MPC] slope parameter G: (0.15) [*A] effective diameter dE: 4.06 ± 0.01 km [M**] geometric albedo: 0.272 ± 0.034 [M**] color index U-B: ? color index B-V: ? taxonomic type: ? mass m: ? density ρ: (1.6 g/cm3) [*A] Hill radius rH: 530 km [*E] other data, primary: diameter dp: 3.91 km [*D] rotation period RPp: 3.0362 ± 0.0003 h [W24a] amplitude in mag., rotational ΔM: 0.37 [W24a] amplitude in mag., mutual events ΔM: 0.08 [W24a] pole direction Β, λ: ? , ? other data, secondary: diameter ds: >1.09 km [*D] diameter ratio ds/dp: >0.28 [W24a] component mag. difference ΔM: <2.8 [*D] rotation period RPs: ?