(44168) 1998 JJ4

--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: Mars crossing asteroid orbital data, primary (osculating elements) [JPL] : semimajor axis a: 2.4342067677 AU orbital period P: 3.797907653 yr (= 1387.1857703 d) eccentricity e: 0.3260920287 perihelion distance q: 1.6404313446 AU aphelion distance Q: 3.2279821907 AU inclination i: 9.85441385° argument of perihelion ω: 117.138202° ascending node Ω: 222.9780049° mean anomaly M: 22.131327° perihelion passage TP: 2025 Aug 27.7214947 Epoch: 2025 Nov 21 data arc: 1987-2025 (2008 obs.) Earth MOID: 0.660434 AU Jupiter Tisserand invariant TJ: 3.412 orbital data, secondary: semimajor axis as: 5.2 km [*E] separation/primary radius as/rp: 3.6 [*E] separation/Hill radius as/rH: 0.014 [*E] orbital period Ps: 0.7246 ± 0.0008 d [A25b] eccentricity es: ? normalized ang. mom. αL: ?

other data, system (combined): absolute mag. H: 15.19 [MPC] slope parameter G: (0.15) [*A] effective diameter dE: 3.04 km [*E] geometric albedo: (0.16 ) [*A] color index U-B: ? color index B-V: ? taxonomic type: ? mass m: ? density ρ: (1.6 g/cm3) [*A] Hill radius rH: 380 km [*E] other data, primary: diameter dp: 2.95 km [*E] axial ratios a/b, b/c: 1.1, ? [*E] rotation period RPp: 2.554 ± 0.0002 h [A25b] amplitude in mag., rotational ΔM: 0.09 [A25b] amplitude in mag., mutual events ΔM: 0.07 [A25b] pole direction Β, λ: ? , ? other data, secondary: diameter ds: >0.77 km [*E] diameter ratio ds/dp: >0.26 [A25b] component mag. difference ΔM: <2.9 [*D] rotation period RPs: ?