2018 TF3

--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: NEA, Apollo (PHA) orbital data, primary (osculating elements) [JPL] : semimajor axis a: 2.1359 AU orbital period P: 3.1216 yr (= 1140.19 d) eccentricity e: 0.71393 perihelion distance q: 0.611033 AU aphelion distance Q: 3.6608 AU inclination i: 6.8924° argument of perihelion ω: 75.6421° ascending node Ω: 52.4167° mean anomaly M: 40.153° perihelion passage TP: 2018 Dec 20.8291 Epoch: 2019 Apr 27 data arc: 2018 Oct 6-31 (171 obs.) Earth MOID: 0.0199328 AU Jupiter Tisserand invariant TJ: 3.327 orbital data, secondary: semimajor axis as: 0.35 km [*E] separation/primary radius as/rp: 2.6 [*E] separation/Hill radius as/rH: 0.008 [*E] orbital period Ps: 0.438 ± 0.0002 d [P18c] eccentricity es: ? normalized ang. mom. αL: ?

other data, system (combined): absolute mag. H: 20.41 ± 0.36 [MPC] slope parameter G: (0.15) [*A] effective diameter dE: 0.28 km [*E] geometric albedo: (0.16 ) [*A] color index U-B: ? color index B-V: ? taxonomic type: ? mass m: ? density ρ: (1.6 g/cm3) [*A] Hill radius rH: 45 km [*E] other data, primary: diameter dp: 0.27 km [*E] rotation period RPp: 2.4398 ± 0.0003 h [P18c] amplitude in mag., rotational ΔM: 0.18 [P18c] amplitude in mag., mutual events ΔM: 0.09 ±0.03 [P18c] pole direction Β, λ: ? , ? other data, secondary: diameter ds: 0.06 km [*E] axial ratios a/b, b/c: 1.5;? [P18c] diameter ratio ds/dp: 0.23 ± 0.02 [P18c] component mag. difference ΔM: 3.2 ± 0.2 [*D] rotation period RPs: 2.3498 ± 0.0003 h [P18c]