(3905) Doppler

--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: 2.559763440 AU orbital period P: 4.095509619 yr (= 1495.884888 d) eccentricity e: 0.257997455 perihelion distance q: 1.89935099 AU aphelion distance Q: 3.220175893 AU inclination i: 14.1901105° argument of perihelion ω: 91.024513° ascending node Ω: 343.325937° mean anomaly M: 31.080034° perihelion passage TP: 2014 Jan 13.85513 Epoch: 2014 May 23 data arc: 1980-2014 (596 obs.) Earth MOID: 0.974059 AU Jupiter Tisserand invariant TJ: 3.347 orbital data, secondary: semimajor axis as: 26 km [*E] separation/primary radius as/rp: 8.3 [*E] separation/Hill radius as/rH: 0.025 [*E] orbital period Ps: 2.117 ± 0.004 d [H14a] eccentricity es: ? normalized ang. mom. αL: ?

other data, system (combined): absolute mag. H: 12.5 [MPC] slope parameter G: (0.15) [*A] effective diameter dE: 7.91 ± 0.05 km [M11b] geometric albedo: 0.236 ± 0.042 [M11b] color index U-B: ? color index B-V: ? taxonomic type: ? mass m: ? density ρ: (1.6 g/cm3) [*A] Hill radius rH: 1000 km [*E] other data, primary: diameter dp: 6.27 km [*D] rotation period RPp: 50.8 ± 0.1 h [H14a] amplitude in mag., rotational ΔM: 1.22 [F13b] pole direction Β, λ: ? , ? other data, secondary: diameter ds: 4.83 km [*D] diameter ratio ds/dp: >0.77 [F13b] component mag. difference ΔM: <0.57 [*D] rotation period RPs: ?