2005 CE81

--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: 42.534 AU orbital period P: 277.4 yr (= 101320.2 d) eccentricity e: 0.04261 perihelion distance q: 40.721 AU aphelion distance Q: 44.346 AU inclination i: 3.08705° argument of perihelion ω: 44.78° ascending node Ω: 103.903° mean anomaly M: 5.89° perihelion passage TP: 2015 Nov 16 Epoch: 2020 May 31 data arc: 2005-2020 (20 obs.) Earth MOID: 39.7333 AU Jupiter Tisserand invariant TJ: 5.827 Neptune Tisserand invariant TN: 3.080 [*D] orbital data, secondary: semimajor axis as: 6960 ± 55 km (separation) [*E] separation/primary radius as/rp: 130 [*E] separation/Hill radius as/rH: 0.020 [*E] orbital period Ps: 150 d [*E] eccentricity es: ? normalized ang. mom. αL: ?

other data, system (combined): absolute mag. H: 7.4 [MPC] 8 ± 0.5 [G20a] slope parameter G: (0.15) [*A] effective diameter dE: 147 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: 360000 km [*E] other data, primary: diameter dp: 107 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: 0.95 component mag. difference ΔM: 0.1 [G20a] rotation period RPs: ?