(5646) 1990 TR

--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, Amor orbital data, primary (osculating elements) [JPL] : semimajor axis a: 2.142140459 AU orbital period P: 3.135307332 yr (= 1145.1710030 d) eccentricity e: 0.437049083 perihelion distance q: 1.20591994 AU aphelion distance Q: 3.078360981 AU inclination i: 7.9144070° argument of perihelion ω: 335.674924° ascending node Ω: 14.140494° mean anomaly M: 201.4491490° perihelion passage TP: 2015 Oct 09.35510 Epoch: 2014 May 23 data arc: 1990-2014 (1058 obs.) Earth MOID: 0.207673 AU Jupiter Tisserand invariant TJ: 3.572 orbital data, secondary: semimajor axis as: 5.1 km [*E] separation/primary radius as/rp: 3.8 [*E] separation/Hill radius as/rH: 0.020 [*E] orbital period Ps: 0.8113 ± 0.0004 d [W13c] eccentricity es: ? normalized ang. mom. αL: ?

other data, system (combined): absolute mag. H: 15.2 [MPC] slope parameter G: (0.15) [*A] effective diameter dE: 2.72 ± 0.52 km [M11d] geometric albedo: 0.454 ± 0.194 [M11d] color index U-B: ? color index B-V: ? taxonomic type: U (SMASSII) [JPL] mass m: ? density ρ: (1.6 g/cm3) [*A] Hill radius rH: 250 km [*E] other data, primary: diameter dp: 2.68 ± 0.51 km [*D] rotation period RPp: 3.1999 ± 0.0002 h [W13c] amplitude in mag., rotational ΔM: 0.12 ± 0.01 [W13c] amplitude in mag., mutual events ΔM: 0.04 ±0.01 [W13c] pole direction Β, λ: ? , ? other data, secondary: diameter ds: 0.48 ± 0.11 km [*D] diameter ratio ds/dp: >0.18 ± 0.02 [W13c] component mag. difference ΔM: <3.7 ± 0.2 [*D] rotation period RPs: ?