(471165) 2010 HE79

--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 orbital data, primary (osculating elements) [JPL] : semimajor axis a: 39.2301 AU orbital period P: 245.714 yr (= 89748.6 d) eccentricity e: 0.180727 perihelion distance q: 32.14018 AU aphelion distance Q: 46.32 AU inclination i: 15.674366° argument of perihelion ω: 284.2439° ascending node Ω: 238.680612° mean anomaly M: 63.6393° perihelion passage TP: 1975 Nov 18.6 Epoch: 2019 Apr 27 data arc: 1992-2019 (181 obs.) Earth MOID: 31.1844 AU Jupiter Tisserand invariant TJ: 5.333 Neptune Tisserand invariant TN: 2.92974961953606 [*D] orbital data, secondary: semimajor axis as: 9300 km (separation) [P20a] separation/primary radius as/rp: 48 [*E] separation/Hill radius as/rH: 0.011 [*E] orbital period Ps: 44 d [*E] eccentricity es: ? normalized ang. mom. αL: ?

other data, system (combined): absolute mag. H: 5.1 [MPC] slope parameter G: (0.15) [*A] effective diameter dE: 423 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: 850000 km [*E] other data, primary: diameter dp: 391 km [*E] rotation period RPp: 19.49 h [JPL] amplitude in mag., rotational ΔM: ? pole direction Β, λ: ? , ? other data, secondary: diameter ds: 160 km [*E] diameter ratio ds/dp: 0.41 [P20a] component mag. difference ΔM: 2 [P20a] rotation period RPs: ?