2003 QY90

--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: 42.6265 AU orbital period P: 278.309 yr (= 101652.3 d) eccentricity e: 0.05534 perihelion distance q: 40.267 AU aphelion distance Q: 44.9855 AU inclination i: 3.77074° argument of perihelion ω: 39.56° ascending node Ω: 104.232° mean anomaly M: 194.55° perihelion passage TP: 2142 Apr 20 Epoch: 2014 May 23 data arc: 2000-2008 (44 obs.) Earth MOID: 39.281 AU Jupiter Tisserand invariant TJ: 5.825 Neptune Tisserand invariant TN: 3.08 [*D] orbital data, secondary: semimajor axis as: 8549 ± 95 km [G11a] separation/primary radius as/rp: 210 [*D] separation/Hill radius as/rH: 0.032 [*D] orbital period Ps: 309.7 ± 0.18 d [G11a] eccentricity es: 0.662 ± 0.009 [G11a] inclination is: 41.79° ± 0.59° [G11a] ascending node Ωs: 113.57° ± 0.39° [G11a] argument of pericenter ωs: 286.7° ± 1.3° [G11a] mean anomaly M: 313.2° ± 1.4° [G11a] Epoch: 2005 May 09.5 normalized ang. mom. αL: ?

other data, system (combined): absolute mag. H: 6.4 [MPC] slope parameter G: (0.15) [*A] effective diameter dE: 114 km [*D] geometric albedo: 0.31 ± 0.13/0.13 [G11a] color index U-B: ? color index B-V: ? taxonomic type: ? mass m: 5.16x1017 ± 1.7x1016 kg [G11a] density ρ: (1 ± 1/0.5 g/cm3) [*A] Hill radius rH: 270000 km [*D] other data, primary: diameter dp: 81 ± 19 km [G11a] rotation period RPp: 3.4 ± 1.1 h [K06a] amplitude in mag., rotational ΔM: 0.34 ± 0.06 [K06a] pole direction Β, λ: ? , ? other data, secondary: diameter ds: 80 km [*D] diameter ratio ds/dp: 0.986 [G11a] component mag. difference ΔM: 0.61 [K06a] rotation period RPs: 7.1 ± 2.9 h [K06a]