(31736) 1999 JR73

--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: 2.9994605093 AU orbital period P: 5.194848959 yr (= 1897.4185823 d) eccentricity e: 0.1118431495 perihelion distance q: 2.6639913992 AU aphelion distance Q: 3.3349296195 AU inclination i: 10.242894° argument of perihelion ω: 161.97007715° ascending node Ω: 188.40997404° mean anomaly M: 251.2697618° perihelion passage TP: 2026 Nov 29.074374 Epoch: 2025 May 05 data arc: 1994-2025 (2462 obs.) Earth MOID: 1.66061 AU Jupiter Tisserand invariant TJ: 3.22 orbital data, secondary: semimajor axis as: 12 km (separation) [W25a] separation/primary radius as/rp: 6.1 [*E] separation/Hill radius as/rH: 0.014 [*E] orbital period Ps: 1.6 d [*E] eccentricity es: ? normalized ang. mom. αL: ?

other data, system (combined): absolute mag. H: 14.28 [MPC] slope parameter G: (0.15) [*A] effective diameter dE: 5.06 ± 0.31 km [M19a] geometric albedo: 0.19 ± 0.031 [M19a] color index U-B: ? color index B-V: ? taxonomic type: mass m: ? density ρ: (1.7 g/cm3) [*A] Hill radius rH: 840 km [*E] other data, primary: diameter dp: 3.9 km [*D] dimensions : 6.0 x 2.6 km [W25a] axial ratios a/b, b/c: 2.3, ? [*D] rotation period RPp: ? amplitude in mag., rotational ΔM: ? pole direction Β, λ: ? , ? other data, secondary: diameter ds: >1.5 km [W25a] diameter ratio ds/dp: >0.38 [*D] component mag. difference ΔM: <2.1 [*D] rotation period RPs: ?