(505447) 2013 SQ99

--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 orbital data, primary (osculating elements) [JPL] : semimajor axis a: 44.1154 AU orbital period P: 293.02 yr (= 107024.5 d) eccentricity e: 0.09531 perihelion distance q: 39.9109 AU aphelion distance Q: 48.3199 AU inclination i: 3.47165° argument of perihelion ω: 176.5° ascending node Ω: 51.9396° mean anomaly M: 142.07° perihelion passage TP: 1903 Sep 08.4 Epoch: 2019 Apr 27 data arc: 2008-2017 (56 obs.) Earth MOID: 38.9012 AU Jupiter Tisserand invariant TJ: 5.904 orbital data, secondary: semimajor axis as: 13300 ± 500 km (separation) [F17a] separation/primary radius as/rp: 140 [*E] separation/Hill radius as/rH: 0.022 [*E] orbital period Ps: 200 d [*E] eccentricity es: ? normalized ang. mom. αL: ?

other data, system (combined): absolute mag. H: 6.4 [MPC] 6.7 ± 0.5 [G19c] slope parameter G: (0.15) [*A] effective diameter dE: 231 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: 610000 km [*E] other data, primary: diameter dp: 180 km [*E] rotation period RPp: ? amplitude in mag., rotational ΔM: ? pole direction Β, λ: ? , ? other data, secondary: diameter ds: 146 km [*E] diameter ratio ds/dp: 0.81 ± 0.03 [F17a] component mag. difference ΔM: 0.46 [*D] rotation period RPs: ?