(15822) Genefahnestock

--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: 1.9479736467 AU orbital period P: 2.7187834388 yr (= 993.0544061 d) eccentricity e: 0.079654835 perihelion distance q: 1.792808127 AU aphelion distance Q: 2.1031391661 AU inclination i: 22.0242221° argument of perihelion ω: 150.055048° ascending node Ω: 190.8513456° mean anomaly M: 31.582657° perihelion passage TP: 2019 Jan 29.879733 Epoch: 2019 Apr 27 data arc: 1953-2018 (1431 obs.) Earth MOID: 0.802213 AU Jupiter Tisserand invariant TJ: 3.802 orbital data, secondary: semimajor axis as: 3.3 km [*E] separation/primary radius as/rp: 3.9 [*E] separation/Hill radius as/rH: 0.014 [*E] orbital period Ps: 0.8388 ± 0.0004 d [W14a] eccentricity es: ? normalized ang. mom. αL: ?

other data, system (combined): absolute mag. H: 14.5 [MPC] slope parameter G: (0.15) [*A] effective diameter dE: 1.72 ± 0.3 km [M11b] geometric albedo: 1 ± 0.18 [M11b] color index U-B: ? color index B-V: ? taxonomic type: ? mass m: ? density ρ: (1.6 g/cm3) [*A] Hill radius rH: 240 km [*E] other data, primary: diameter dp: 1.69 ± 0.3 km [*D] rotation period RPp: 2.96 ± 0 h [W14a] amplitude in mag., rotational ΔM: ? pole direction Β, λ: ? , ? other data, secondary: diameter ds: >0.32 ± 0.07 km [*D] diameter ratio ds/dp: >0.19 ± 0.02 [W14a] component mag. difference ΔM: <3.6 ± 0.2 [*D] rotation period RPs: ?