2015 RO281

--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: 44.29 AU orbital period P: 294.76 yr (= 107661 d) eccentricity e: 0.17764 perihelion distance q: 36.422 AU aphelion distance Q: 52.158 AU inclination i: 2.37096° argument of perihelion ω: 123.19° ascending node Ω: 281.394° mean anomaly M: 347.2° perihelion passage TP: 2034 Sep 17 Epoch: 2024 Mar 31 data arc: 2015-2017 (32 obs.) Earth MOID: 35.4325 AU Jupiter Tisserand invariant TJ: 5.855 Neptune Tisserand invariant TN: 3.066 [*D] orbital data, secondary: semimajor axis as: 1300 km (separation) [P24b] separation/primary radius as/rp: 20 [*E] separation/Hill radius as/rH: 0.0041 [*E] orbital period Ps: 12 d [*E] eccentricity es: ? normalized ang. mom. αL: ?

other data, system (combined): absolute mag. H: 7.5 [MPC] slope parameter G: (0.15) [*A] effective diameter dE: 139 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: 320000 km [*E] other data, primary: diameter dp: 129 km [*E] rotation period RPp: ? amplitude in mag., rotational ΔM: ? pole direction Β, λ: ? , ? other data, secondary: diameter ds: 52 km [*E] diameter ratio ds/dp: 0.4 [P24b] component mag. difference ΔM: 2.0 [*D] rotation period RPs: ?