(313538) 2002 YB12

--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: NEA, Apollo orbital data, primary (osculating elements) [JPL] : semimajor axis a: 1.6871930387 AU orbital period P: 2.1915700893 yr (= 800.4709751 d) eccentricity e: 0.550945377 perihelion distance q: 0.757641835 AU aphelion distance Q: 2.6167442428 AU inclination i: 14.0352698° argument of perihelion ω: 306.157774° ascending node Ω: 270.9824° mean anomaly M: 10.215987° perihelion passage TP: 2025 Apr 12.284441 Epoch: 2025 May 05 data arc: 2002-2025 (575 obs.) Earth MOID: 0.072273 AU Jupiter Tisserand invariant TJ: 4.006 orbital data, secondary: semimajor axis as: 0.83 km [*E] separation/primary radius as/rp: 3.1 [*E] separation/Hill radius as/rH: 0.024 [*E] orbital period Ps: 0.5217 ± 0.0004 d [P25b] eccentricity es: ? normalized ang. mom. αL: ?

other data, system (combined): absolute mag. H: 18.39 [MPC] slope parameter G: (0.15) [*A] effective diameter dE: 0.57 km [*E] geometric albedo: (0.24 ) [*A] color index U-B: ? color index B-V: ? taxonomic type: mass m: ? density ρ: (2 g/cm3) [*A] Hill radius rH: 34 km [*E] other data, primary: diameter dp: 0.53 km [*E] axial ratios a/b, b/c: 1.08, ? [*E] rotation period RPp: 2.6083 ± 0.0005 h [P25b] amplitude in mag., rotational ΔM: 0.08 [P25b] amplitude in mag., mutual events ΔM: 0.16 [P25b] pole direction Β, λ: ? , ? other data, secondary: diameter ds: 0.21 km [*E] axial ratios a/b, b/c: 1.56;? [P25b] diameter ratio ds/dp: 0.4 ± 0.02 [P25b] component mag. difference ΔM: 1.99 ± 0.11 [*D] rotation period RPs: 12.52 ± 0.01 h [P25b]