(3912) Troja

--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: 2.3764377616 AU orbital period P: 3.663514116 yr (= 1338.098531 d) eccentricity e: 0.030612717 perihelion distance q: 2.303688546 AU aphelion distance Q: 2.4491869774 AU inclination i: 2.40189097° argument of perihelion ω: 59.864529° ascending node Ω: 26.1369466° mean anomaly M: 254.480629° perihelion passage TP: 2022 Jul 28.20921 Epoch: 2021 Jul 01 data arc: 1937-2021 (3052 obs.) Earth MOID: 1.32072 AU Jupiter Tisserand invariant TJ: 3.539 orbital data, secondary: semimajor axis as: 10 km [*E] separation/primary radius as/rp: 3.6 [*E] separation/Hill radius as/rH: 0.010 [*E] orbital period Ps: 0.72379 ± 0.00012 d [B21h] eccentricity es: ? normalized ang. mom. αL: ?

other data, system (combined): absolute mag. H: 13.21 [MPC] slope parameter G: (0.15) [*A] effective diameter dE: 5.93 ± 0.16 km [M**] geometric albedo: 0.328 ± 0.028 [M**] color index U-B: ? color index B-V: ? taxonomic type: ? mass m: ? density ρ: (1.6 g/cm3) [*A] Hill radius rH: 1000 km [*E] other data, primary: diameter dp: 5.63 ± 0.15 km [*D] rotation period RPp: 3.65938 ± 0.00007 h [B21h] amplitude in mag., rotational ΔM: 0.18 [B21h] amplitude in mag., mutual events ΔM: 0.125 ±0.015 [B21h] pole direction Β, λ: ? , ? other data, secondary: diameter ds: 1.86 ± 0.12 km [*D] axial ratios a/b, b/c: 1.4;? [B21h] diameter ratio ds/dp: 0.33 ± 0.02 [B21h] component mag. difference ΔM: 2.41 ± 0.13 [*D] rotation period RPs: 17.371 ± 0.003 h [B21h]