(18890) 2000 EV26

--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: 1.9170260852 AU orbital period P: 2.654251269 yr (= 969.4835858 d) eccentricity e: 0.073965409 perihelion distance q: 1.77523247 AU aphelion distance Q: 2.0588197042 AU inclination i: 22.975958° argument of perihelion ω: 265.812461° ascending node Ω: 184.419159° mean anomaly M: 285.7793° perihelion passage TP: 2015 Jun 26.87708 Epoch: 2014 Dec 09 data arc: 1984-2014 (734 obs.) Earth MOID: 0.873107 AU Jupiter Tisserand invariant TJ: 3.829 orbital data, secondary: semimajor axis as: 6 km [*E] separation/primary radius as/rp: 3.1 [*E] separation/Hill radius as/rH: 0.011 [*E] orbital period Ps: 0.5954 ± 0.0004 d [W15c] eccentricity es: ? normalized ang. mom. αL: ?

other data, system (combined): absolute mag. H: 14.6 [MPC] slope parameter G: (0.15) [*A] effective diameter dE: 4 km [*E] geometric albedo: (0.16 ) [*A] color index U-B: ? color index B-V: ? taxonomic type: ? mass m: ? density ρ: (1.6 g/cm3) [*A] Hill radius rH: 540 km [*E] other data, primary: diameter dp: 3.86 km [*E] rotation period RPp: 3.8216 ± 0.0005 h [W15c] amplitude in mag., rotational ΔM: 0.11 ± 0.01 [W15c] pole direction Β, λ: ? , ? other data, secondary: diameter ds: >1.04 km [*E] diameter ratio ds/dp: >0.27 ± 0.02 [W15c] component mag. difference ΔM: <2.8 [*D] rotation period RPs: 14.29 ± 0.01 h [W15c]