(7307) Takei

--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: 2.740462141 AU orbital period P: 4.53665455 yr (= 1657.044368 d) eccentricity e: 0.087150769 perihelion distance q: 2.501628759 AU aphelion distance Q: 2.979295523 AU inclination i: 6.99059915° argument of perihelion ω: 119.941497° ascending node Ω: 42.9867734° mean anomaly M: 356.7805283° perihelion passage TP: 2020 Dec 31.818910 Epoch: 2021 Jul 01 data arc: 1978-2021 (3614 obs.) Earth MOID: 1.51701 AU Jupiter Tisserand invariant TJ: 3.334 orbital data, secondary: semimajor axis as: 19 km [*E] separation/primary radius as/rp: 3.9 [*E] separation/Hill radius as/rH: 0.010 [*E] orbital period Ps: 0.8336 ± 0.0001 d [B21f] eccentricity es: ? normalized ang. mom. αL: ?

other data, system (combined): absolute mag. H: 12.57 [MPC] slope parameter G: (0.15) [*A] effective diameter dE: 10.1 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: 1900 km [*E] other data, primary: diameter dp: 9.8 km [*E] rotation period RPp: 2.74685 ± 0.00006 h [B21f] amplitude in mag., rotational ΔM: 0.19 [B21f] amplitude in mag., mutual events ΔM: 0.09 ±0.03 [B21f] pole direction Β, λ: ? , ? other data, secondary: diameter ds: >2.4 km [*E] diameter ratio ds/dp: >0.24 [B21f] component mag. difference ΔM: <3.1 [*D] rotation period RPs: 20.007 ± 0.003 h [B21f]