2005 GD187

--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: 43.253 AU orbital period P: 284.469 yr (= 103902.4 d) eccentricity e: 0.01475 perihelion distance q: 42.615 AU aphelion distance Q: 43.891 AU inclination i: 0.69800° argument of perihelion ω: 343.29° ascending node Ω: 354.536° mean anomaly M: 183.50° perihelion passage TP: 2153 Nov 12 Epoch: 2014 May 23 data arc: 2005-2013 (17 obs.) Earth MOID: 41.6049 AU Jupiter Tisserand invariant TJ: 5.886 Neptune Tisserand invariant TN: 3.09 [*D] orbital data, secondary: semimajor axis as: 7600 ± 300 km (separation) [G12b] separation/primary radius as/rp: 120 [*E] separation/Hill radius as/rH: 0.019 [*E] orbital period Ps: 150 d [*E] eccentricity es: ? normalized ang. mom. αL: ?

other data, system (combined): absolute mag. H: 7.2 [MPC] slope parameter G: (0.15) [*A] effective diameter dE: 160 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: 410000 km [*E] other data, primary: diameter dp: 123 km [*E] rotation period RPp: ? amplitude in mag., rotational ΔM: ? pole direction Β, λ: ? , ? other data, secondary: diameter ds: 102 km [*E] diameter ratio ds/dp: 0.832 [G12b] component mag. difference ΔM: 0.4 [G12b] rotation period RPs: ?