(3255) Tholen

--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: Mars crossing asteroid orbital data, primary (osculating elements) [JPL] : semimajor axis a: 2.3725504284 AU orbital period P: 3.6545287297 yr (= 1334.81661854 d) eccentricity e: 0.3629552242 perihelion distance q: 1.5114208558 AU aphelion distance Q: 3.233680001 AU inclination i: 21.36255488° argument of perihelion ω: 79.50176029° ascending node Ω: 336.99793494° mean anomaly M: 39.89845631° perihelion passage TP: 2024 Dec 08.0635485 Epoch: 2025 May 05 data arc: 1969-2025 (3309 obs.) Earth MOID: 0.668577 AU Jupiter Tisserand invariant TJ: 3.365 orbital data, secondary: semimajor axis as: 13 km [*E] separation/primary radius as/rp: 7.3 [*E] separation/Hill radius as/rH: 0.018 [*E] orbital period Ps: 1.848 ± 0.003 d [B25c] eccentricity es: ? normalized ang. mom. αL: ?

other data, system (combined): absolute mag. H: 13.6 [MPC] slope parameter G: (0.15) [*A] effective diameter dE: 4.02 ± 0.85 km [] geometric albedo: 0.341 ± 0.192 [] color index U-B: ? color index B-V: ? taxonomic type: S (SMASSII) [JPL] mass m: ? density ρ: (2 g/cm3) [*A] Hill radius rH: 750 km [*E] other data, primary: diameter dp: 3.67 ± 0.78 km [*D] axial ratios a/b, b/c: 1.2, ? [*E] rotation period RPp: 2.9461 ± 0.0003 h [B25c] amplitude in mag., rotational ΔM: 0.16 [B25c] amplitude in mag., mutual events ΔM: 0.2 [B25c] pole direction Β, λ: ? , ? other data, secondary: diameter ds: >1.65 km [*D] axial ratios a/b, b/c: 1.4;? [B25c] diameter ratio ds/dp: >0.45 [B25c] component mag. difference ΔM: <1.73 [*D] rotation period RPs: 44.36 ± 0.07 h [B25c]