2003 HG57

--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: 43.677 AU orbital period P: 288.657 yr (= 105432.1 d) eccentricity e: 0.03179 perihelion distance q: 42.288 AU aphelion distance Q: 45.065 AU inclination i: 2.09608° argument of perihelion ω: 223.16° ascending node Ω: 36.3070° mean anomaly M: 316.65° perihelion passage TP: 2049 Feb 24 Epoch: 2014 May 23 data arc: 2003-2013 (19 obs.) Earth MOID: 41.2731 AU Jupiter Tisserand invariant TJ: 5.907 Neptune Tisserand invariant TN: 3.10 [*D] orbital data, secondary: semimajor axis as: 13200 ± 50 km (separation) [G12b] separation/primary radius as/rp: 170 [*E] separation/Hill radius as/rH: 0.024 [*E] orbital period Ps: 210 d [*E] eccentricity es: ? normalized ang. mom. αL: ?

other data, system (combined): absolute mag. H: 6.5 [MPC] slope parameter G: (0.15) [*A] effective diameter dE: 221 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: 550000 km [*E] other data, primary: diameter dp: 156 km [*E] rotation period RPp: ? amplitude in mag., rotational ΔM: ? pole direction Β, λ: ? , ? other data, secondary: diameter ds: 156 km [*E] diameter ratio ds/dp: 1 [G12b] component mag. difference ΔM: 0.0 [G12b] rotation period RPs: ?