(2825) Crosby

--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: 2.245836727 AU orbital period P: 3.36563697 yr (= 1229.3221204 d) eccentricity e: 0.173473099 perihelion distance q: 1.85624447 AU aphelion distance Q: 2.6354289833 AU inclination i: 3.5211341° argument of perihelion ω: 81.47056° ascending node Ω: 329.512063° mean anomaly M: 69.170053° perihelion passage TP: 2016 Jun 24.799234 Epoch: 2017 Feb 16 data arc: 1938-2017 (1599 obs.) Earth MOID: 0.871005 AU Jupiter Tisserand invariant TJ: 3.608 orbital data, secondary: semimajor axis as: 7.8 km [*E] orbital period Ps: 0.5979 ± 0.0002 d [P17d] eccentricity es: ? normalized ang. mom. αL: ?

other data, system (combined): absolute mag. H: 13.2 [MPC] slope parameter G: (0.15) [*A] effective diameter dE: 5.06 ± 0.15 km [M11b] geometric albedo: 0.301 ± 0.039 [M11b] color index U-B: ? color index B-V: ? taxonomic type: ? mass m: ? density ρ: (1.6 g/cm3) [*A] Hill radius rH: 720 km [*E] other data, primary: diameter dp: 4.98 ± 0.15 km [*D] rotation period RPp: 2.8135 ± 0.0002 h [P16d] amplitude in mag., rotational ΔM: 0.08 [P16d] amplitude in mag., mutual events ΔM: 0.06 ±0.02 [P16d] pole direction Β, λ: ? , ? other data, secondary: diameter ds: >0.9 km [*D] diameter ratio ds/dp: >0.18 [P16d] component mag. difference ΔM: <3.7 [*D] rotation period RPs: ?