(444025) 2004 HJ79

--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: 43.7305 AU orbital period P: 289.191 yr (= 105627 d) eccentricity e: 0.047717 perihelion distance q: 41.6438 AU aphelion distance Q: 45.8172 AU inclination i: 3.32482° argument of perihelion ω: 288.763° ascending node Ω: 45.3087° mean anomaly M: 261.189° perihelion passage TP: 2103 Aug 17 Epoch: 2024 Mar 31 data arc: 2004-2017 (74 obs.) Earth MOID: 40.6353 AU Jupiter Tisserand invariant TJ: 5.901 Neptune Tisserand invariant TN: 3.093 [*D] orbital data, secondary: semimajor axis as: 1600 km (separation) [P24b] separation/primary radius as/rp: 23 [*E] separation/Hill radius as/rH: 0.0039 [*E] orbital period Ps: 14 d [*E] eccentricity es: ? normalized ang. mom. αL: ?

other data, system (combined): absolute mag. H: 7.18 [MPC] slope parameter G: (0.15) [*A] effective diameter dE: 161 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: 137 km [*E] rotation period RPp: 7.5 h [JPL] amplitude in mag., rotational ΔM: ? pole direction Β, λ: ? , ? other data, secondary: diameter ds: 85 km [*E] diameter ratio ds/dp: 0.62 [P24b] component mag. difference ΔM: 1.0 [*D] rotation period RPs: ?