2024 XW49

--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: trans-Neptunian object orbital data, primary (osculating elements) [JPL] : semimajor axis a: 45.98 AU orbital period P: 311.7 yr (= 113865 d) eccentricity e: 0.185 perihelion distance q: 37.49 AU aphelion distance Q: 54.46 AU inclination i: 9.6654° argument of perihelion ω: 262.3° ascending node Ω: 138.415° mean anomaly M: 35.4° perihelion passage TP: 1995 Mar Epoch: 2025 Nov 21 data arc: 2024-2025 (11 obs.) Earth MOID: 36.35091 AU Jupiter Tisserand invariant TJ: 5.873 Neptune Tisserand invariant TN: 3.050 [*D] orbital data, secondary: semimajor axis as: 38000 km (separation) [S26a] separation/primary radius as/rp: 800 [*E] separation/Hill radius as/rH: 0.142 [*E] orbital period Ps: 2600 d [*E] eccentricity es: ? normalized ang. mom. αL: ?

other data, system (combined): absolute mag. H: 7.45 ± 0.13 [JPL] slope parameter G: (0.15) [*A] effective diameter dE: 119 km [*E] geometric albedo: (0.13 ) [*A] color index U-B: ? color index B-V: ? taxonomic type: ? mass m: ? density ρ: (1 g/cm3) [*A] Hill radius rH: 270000 km [*E] other data, primary: diameter dp: 95 km [*E] rotation period RPp: ? amplitude in mag., rotational ΔM: ? pole direction Β, λ: ? , ? other data, secondary: diameter ds: 72 km [*E] diameter ratio ds/dp: 0.76 [*D] component mag. difference ΔM: 0.6 [S26a] rotation period RPs: ?