2015 GC58

--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: 43.8782 AU orbital period P: 290.657 yr (= 106163 d) eccentricity e: 0.0292 perihelion distance q: 42.595 AU aphelion distance Q: 45.1611 AU inclination i: 2.93178° argument of perihelion ω: 341.8° ascending node Ω: 93.8° mean anomaly M: 134.7° perihelion passage TP: 1915 Jun Epoch: 2024 Mar 31 data arc: 2015-2017 (36 obs.) Earth MOID: 41.611 AU Jupiter Tisserand invariant TJ: 5.916 Neptune Tisserand invariant TN: 3.097 [*D] orbital data, secondary: semimajor axis as: 1000 km (separation) [P24b] separation/primary radius as/rp: 17 [*E] separation/Hill radius as/rH: 0.0030 [*E] orbital period Ps: 9.4 d [*E] eccentricity es: ? normalized ang. mom. αL: ?

other data, system (combined): absolute mag. H: 7.7 [MPC] slope parameter G: (0.15) [*A] effective diameter dE: 127 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: 340000 km [*E] other data, primary: diameter dp: 116 km [*E] rotation period RPp: ? amplitude in mag., rotational ΔM: ? pole direction Β, λ: ? ,? other data, secondary: diameter ds: 51 km [*E] diameter ratio ds/dp: 0.44 [P24b] component mag. difference ΔM: 1.8 [*D] rotation period RPs: ?