(849935) 2006 RA55

--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, Amor orbital data, primary (osculating elements) [JPL] : semimajor axis a: 2.4379022478 AU orbital period P: 3.8065595995 yr (= 1390.3458937 d) eccentricity e: 0.495431416 perihelion distance q: 1.23008889 AU aphelion distance Q: 3.6457156104 AU inclination i: 1.7984411° argument of perihelion ω: 61.40034° ascending node Ω: 21.47902° mean anomaly M: 350.1101905° perihelion passage TP: 2025 Dec 29.195156 Epoch: 2025 Nov 21 data arc: 2006-2025 (328 obs.) Earth MOID: 0.247485 AU Jupiter Tisserand invariant TJ: 3.323 orbital data, secondary: semimajor axis as: 0.45 km [*E] separation/primary radius as/rp: 2.4 [*E] separation/Hill radius as/rH: 0.013 [*E] orbital period Ps: 0.4053 ± 0.0002 d [P25h] eccentricity es: ? normalized ang. mom. αL: ?

other data, system (combined): absolute mag. H: 19.69 [MPC] 19.65 ± 0.03 [P25h] slope parameter G: 0.3 [P25h] effective diameter dE: 0.38 km [*E] geometric albedo: (0.16 ) [*A] color index U-B: ? color index B-V: ? color index V-R: 0.39 ± 0.02 [P25h] taxonomic type: ? mass m: ? density ρ: (1.6 g/cm3) [*A] Hill radius rH: 36 km [*E] other data, primary: diameter dp: 0.37 km [*E] axial ratios a/b, b/c: 1.1, ? [*E] rotation period RPp: 2.5218 ± 0.0003 h [P25h] amplitude in mag., rotational ΔM: 0.06 [P25h] amplitude in mag., mutual events ΔM: 0.08 [P25h] pole direction Β, λ: ? , ? other data, secondary: diameter ds: 0.10 km [*E] diameter ratio ds/dp: 0.28 ± 0.02 [P25h] component mag. difference ΔM: 2.8 ± 0.16 [*D] rotation period RPs: ?