(4373) Crespo

--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: 2.2313829686 AU orbital period P: 3.33326140043 yr (= 1217.47372651 d) eccentricity e: 0.17538042077 perihelion distance q: 1.84004208468 AU aphelion distance Q: 2.62272385252 AU inclination i: 4.960326138° argument of perihelion ω: 240.42802752° ascending node Ω: 154.35276953° mean anomaly M: 337.16208219° perihelion passage TP: 2026 Feb 06.2349025 Epoch: 2025 Nov 21 data arc: 1975-2025 (4987 obs.) Earth MOID: 0.85137 AU Jupiter Tisserand invariant TJ: 3.616 orbital data, secondary: semimajor axis as: 14 km [*E] separation/primary radius as/rp: 5.8 [*E] separation/Hill radius as/rH: 0.019 [*E] orbital period Ps: 1.3475 ± 0.0004 d [D25b] eccentricity es: ? normalized ang. mom. αL: ?

other data, system (combined): absolute mag. H: 13.59 [MPC] slope parameter G: (0.15) [*A] effective diameter dE: 5.02 ± 0.18 km [M19a] geometric albedo: 0.336 ± 0.056 [M19a] color index U-B: ? color index B-V: ? color index J-H: 1.125 [S10b] taxonomic type: S (SMASSII) [X95a] mass m: ? density ρ: (2 g/cm3) [*A] Hill radius rH: 750 km [*E] other data, primary: diameter dp: 4.79 ± 0.17 km [*D] axial ratios a/b, b/c: 1.1, ? [*E] rotation period RPp: 3.5669 ± 0.0001 h [D25b] amplitude in mag., rotational ΔM: 0.07 [D25b] amplitude in mag., mutual events ΔM: 0.1 [D25b] pole direction Β, λ: ? , ? other data, secondary: diameter ds: 1.49 ± 0.11 km [*D] diameter ratio ds/dp: 0.31 ± 0.02 [D25b] component mag. difference ΔM: 2.54 ± 0.14 [*D] rotation period RPs: ?