(182933) 2002 GZ31

--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, scattered disk orbital data, primary (osculating elements) [JPL] : semimajor axis a: 50.378 AU orbital period P: 357.575 yr (= 130604.4 d) eccentricity e: 0.23863 perihelion distance q: 38.3564 AU aphelion distance Q: 62.399 AU inclination i: 1.05431° argument of perihelion ω: 164.134° ascending node Ω: 117.273° mean anomaly M: 334.391° perihelion passage TP: 2039 Oct 29 Epoch: 2014 May 23 data arc: 2002-2008 (68 obs.) Earth MOID: 37.3394 AU Jupiter Tisserand invariant TJ: 6.146 Neptune Tisserand invariant TN: 3.11 [*D] orbital data, secondary: semimajor axis as: 2060 ± 270 km (separation) [N07c] separation/primary radius as/rp: 21 [*E] separation/Hill radius as/rH: 0.0038 [*E] orbital period Ps: 12 d [*E] eccentricity es: ? normalized ang. mom. αL: ?

other data, system (combined): absolute mag. H: 6.4 [MPC] 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: 540000 km [*E] other data, primary: diameter dp: 195 km [*E] rotation period RPp: ? amplitude in mag., rotational ΔM: ? pole direction Β, λ: ? , ? other data, secondary: diameter ds: 123 km [*E] diameter ratio ds/dp: 0.631 ± 0.058 [N08c] component mag. difference ΔM: 1.0 [I8815] rotation period RPs: ?