(53432) 1999 UT55

--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, Hungaria orbital data, primary (osculating elements) [JPL] : semimajor axis a: 1.871650083 AU orbital period P: 2.560620330 yr (= 935.266575 d) eccentricity e: 0.11587349 perihelion distance q: 1.65477546 AU aphelion distance Q: 2.088524707 AU inclination i: 22.438208° argument of perihelion ω: 126.671892° ascending node Ω: 268.739716° mean anomaly M: 242.524920° perihelion passage TP: 2015 Mar 24.1958 Epoch: 2014 May 23 data arc: 1994-2013 (308 obs.) Earth MOID: 0.7172 AU Jupiter Tisserand invariant TJ: 3.881 orbital data, secondary: semimajor axis as: 4 km [*E] separation/primary radius as/rp: 3.1 [*E] separation/Hill radius as/rH: 0.012 [*E] orbital period Ps: 0.5875 ± 0.0004 d [W13d] eccentricity es: ? normalized ang. mom. αL: ?

other data, system (combined): absolute mag. H: 15.5 [MPC] slope parameter G: (0.15) [*A] effective diameter dE: 2.62 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: 330 km [*E] other data, primary: diameter dp: 2.55 km [*E] rotation period RPp: 3.330 ± 0.002 h [W13d] amplitude in mag., rotational ΔM: 0.10 ± 0.01 [W13d] amplitude in mag., mutual events ΔM: 0.10 ±0.04 [W13d] pole direction Β, λ: ? , ? other data, secondary: diameter ds: 0.59 km [*E] diameter ratio ds/dp: >0.23 ± 0.02 [W13d] component mag. difference ΔM: <3.2 ± 0.2 [*D] rotation period RPs: ?