1999 CM158

--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, plutino orbital data, primary (osculating elements) [JPL] : semimajor axis a: 39.4701 AU orbital period P: 247.972 yr (= 90573.5 d) eccentricity e: 0.277456 perihelion distance q: 28.51888 AU aphelion distance Q: 50.4214 AU inclination i: 9.30009° argument of perihelion ω: 164.9984° ascending node Ω: 339.08931° mean anomaly M: 40.6904° perihelion passage TP: 1992 May 20.59 Epoch: 2020 May 31 data arc: 1999-2016 (51 obs.) Earth MOID: 27.5323 AU Jupiter Tisserand invariant TJ: 5.354 Neptune Tisserand invariant TN: 2.934 [*D] orbital data, secondary: semimajor axis as: 450 ± 70 km (separation) [G21b] separation/primary radius as/rp: 9.8 [*E] separation/Hill radius as/rH: 0.0024 [*E] orbital period Ps: ? d [*E] eccentricity es: ? normalized ang. mom. αL: ?

other data, system (combined): absolute mag. H: 7.8 [MPC] 8.1 ± 0.5 [G20a] slope parameter G: (0.15) [*A] effective diameter dE: 106 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: 180000 km [*E] other data, primary: diameter dp: 92 km [*E] rotation period RPp: ? amplitude in mag., rotational ΔM: ? pole direction Β, λ: ? , ? other data, secondary: diameter ds: 53 km [*E] diameter ratio ds/dp: 0.58 component mag. difference ΔM: 1.2 [G20a] rotation period RPs: ?