2013 EM149

--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: TNO, Cubewano cold orbital data, primary (osculating elements) [JPL] : semimajor axis a: 45.0017 AU orbital period P: 301.892 yr (= 110266 d) eccentricity e: 0.053336 perihelion distance q: 42.6015 AU aphelion distance Q: 47.4019 AU inclination i: 2.63678° argument of perihelion ω: 11.59° ascending node Ω: 169.4349° mean anomaly M: 44.8° perihelion passage TP: 1986 Sep 05 Epoch: 2024 Mar 31 data arc: 2005-2015 (44 obs.) Earth MOID: 41.6052 AU Jupiter Tisserand invariant TJ: 5.983 Neptune Tisserand invariant TN: 3.109 [*D] orbital data, secondary: semimajor axis as: 1600 km (separation) [P24b] separation/primary radius as/rp: 20 [*E] separation/Hill radius as/rH: 0.0031 [*E] orbital period Ps: 10 d [*E] eccentricity es: ? normalized ang. mom. αL: ?

other data, system (combined): absolute mag. H: 6.7 [MPC] slope parameter G: (0.15) [*A] effective diameter dE: 201 km [*E] geometric albedo: (0.09 ) [*A] color index U-B: ? color index B-V: ? taxonomic type: ? mass m: ? density ρ: (1 g/cm3) [*A] Hill radius rH: 510000 km [*E] other data, primary: diameter dp: 164 km [*E] rotation period RPp: ? amplitude in mag., rotational ΔM: ? pole direction Β, λ: ? , ? other data, secondary: diameter ds: 116 km [*E] diameter ratio ds/dp: 0.71 [P24b] component mag. difference ΔM: 0.7 [*D] rotation period RPs: ?