(377732) 2005 XJ8

--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 (PHA) orbital data, primary (osculating elements) [JPL] : semimajor axis a: 1.9302637508 AU orbital period P: 2.6818419802 yr (= 979.5427833 d) eccentricity e: 0.62148632 perihelion distance q: 0.730631235 AU aphelion distance Q: 3.1298962662 AU inclination i: 23.5776887° argument of perihelion ω: 67.3077114° ascending node Ω: 115.9431959° mean anomaly M: 43.7577333° perihelion passage TP: 2022 Apr 11.937300 Epoch: 2022 Aug 09 data arc: 2005-2022 (798 obs.) Earth MOID: 0.0173517 AU Jupiter Tisserand invariant TJ: 3.57 orbital data, secondary: semimajor axis as: ? orbital period Ps: ? eccentricity es: ? normalized ang. mom. αL: ?

other data, system (combined): absolute mag. H: 17.07 [MPC] slope parameter G: (0.15) [*A] effective diameter dE: 0.986 ± 0.028 km [M**] geometric albedo: 0.288 ± 0.034 [M**] color index U-B: ? color index B-V: ? taxonomic type: ? mass m: ? density ρ: (1.6 g/cm3) [*A] Hill radius rH: 150 km [*E] other data, primary: diameter dp: 0.986 ± 0.028 km [M**] rotation period RPp: 42.89 ± 0.03 h [W22f] amplitude in mag., rotational ΔM: 0.9 ± 0.03 [W22f] pole direction Β, λ: ? , ? other data, secondary: diameter ds: ? diameter ratio ds/dp: ? component mag. difference ΔM: ? rotation period RPs: 9.396 ± 0.004 h [W22f]