(7958) Leakey

--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, Hungaria orbital data, primary (osculating elements) [JPL] : semimajor axis a: 1.877005940 AU orbital period P: 2.571619277 yr (= 939.2839410 d) eccentricity e: 0.077056381 perihelion distance q: 1.73237065 AU aphelion distance Q: 2.021641225 AU inclination i: 21.9707404° argument of perihelion ω: 154.054586° ascending node Ω: 195.745035° mean anomaly M: 196.600545° perihelion passage TP: 2015 Jul 23.3291 Epoch: 2014 May 23 data arc: 1986-2014 (626 obs.) Earth MOID: 0.73966 AU Jupiter Tisserand invariant TJ: 3.883 orbital data, secondary: semimajor axis as: 10 km [*E] separation/primary radius as/rp: 7.1 [*E] separation/Hill radius as/rH: 0.026 [*E] orbital period Ps: 2.095 ± 0.003 d [W12b] eccentricity es: ? normalized ang. mom. αL: ?

other data, system (combined): absolute mag. H: 14.1 [MPC] slope parameter G: (0.15) [*A] effective diameter dE: 2.94 ± 0.17 km [M12b] geometric albedo: 0.468 ± 0.073 [M12b] color index U-B: ? color index B-V: ? taxonomic type: ? mass m: ? density ρ: (1.6 g/cm3) [*A] Hill radius rH: 380 km [*E] other data, primary: diameter dp: 2.82 ± 0.16 km [*D] rotation period RPp: 2.34843 ± 0.00006 h [W12b] amplitude in mag., rotational ΔM: 0.22 [W12b] pole direction Β, λ: ? , ? other data, secondary: diameter ds: 0.85 ± 0.1 km [*D] axial ratios a/b, b/c: 2;? [] diameter ratio ds/dp: 0.30 ± 0.03 [W12b] component mag. difference ΔM: 2.6 ± 0.2 [*D] rotation period RPs: ?