(16525) Shumarinaiko

--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: main belt asteroid orbital data, primary (osculating elements) [JPL] : semimajor axis a: 2.399529197 AU orbital period P: 3.717040219 yr (= 1357.648940 d) eccentricity e: 0.138775564 perihelion distance q: 2.06653318 AU aphelion distance Q: 2.732525214 AU inclination i: 2.4285840° argument of perihelion ω: 180.21635° ascending node Ω: 7.66415° mean anomaly M: 72.495981° perihelion passage TP: 2013 Aug 22.59974 Epoch: 2014 May 23 data arc: 1950-2013 (1169 obs.) Earth MOID: 1.06786 AU Jupiter Tisserand invariant TJ: 3.512 orbital data, secondary: semimajor axis as: 8.1 km [*E] separation/primary radius as/rp: 3.1 [*E] separation/Hill radius as/rH: 0.0097 [*E] orbital period Ps: 0.6004 ± 0.0002 d [W13e] eccentricity es: ? normalized ang. mom. αL: ?

other data, system (combined): absolute mag. H: 13.5 [MPC] slope parameter G: (0.15) [*A] effective diameter dE: 5.25 ± 0.15 km [M11b] geometric albedo: 0.306 ± 0.033 [M11b] color index U-B: ? color index B-V: ? taxonomic type: ? mass m: ? density ρ: (1.6 g/cm3) [*A] Hill radius rH: 830 km [*E] other data, primary: diameter dp: 5.18 ± 0.15 km [*D] rotation period RPp: 2.5932 ± 0.0003 h [W13e] amplitude in mag., rotational ΔM: 0.08 ± 0.01 [W13e] amplitude in mag., mutual events ΔM: 0.05 [W13e] pole direction Β, λ: ? , ? other data, secondary: diameter ds: 0.83 ± 0.11 km [*D] diameter ratio ds/dp: >0.16 ± 0.02 [W13e] component mag. difference ΔM: <4.0 ± 0.3 [*D] rotation period RPs: 14.409 h [W13e]