(1866)
_dynamical type, primary:_NEA, Apollo
_orbital data, primary (osculating elements)_[JPL] :
| semimajor axis a: | 1.893818726 AU |
|---|---|
| orbital period P: | 2.606248439 yr (= 951.9322422 d) |
| eccentricity e: | 0.538293967 |
| perihelion distance q: | 0.874387531 AU |
| aphelion distance Q: | 2.913249921 AU |
| inclination i: | 41.18974205° |
| argument of perihelion ω: | 293.0454938° |
| ascending node Ω: | 63.56059474° |
| mean anomaly M: | 352.0426005° |
| perihelion passage TP: | 2014 Jun 13.04140 |
| Epoch**:** | 2014 May 23 |
| data arc**:** | 1955-2013 (2352 obs.) |
| Earth MOID**:** | 0.103525 AU |
| Jupiter Tisserand invariant TJ: | 3.513 |
orbital data, secondary:
| semimajor axis as: | 19 km [*E] |
|---|---|
| separation/primary radius as/rp: | 4.5 [*E] |
| separation/Hill radius as/rH: | 0.033 [*E] |
| orbital period Ps: | 1.13 d [W17a] |
| eccentricity es: | ? |
| normalized ang. mom. αL: | ? |
other data, system (combined):
| absolute mag. H: | 12.4 [MPC] |
|---|---|
| slope parameter G: | (0.15) [*A] |
| effective diameter dE: | 8.48 ± 1.27 km [D03a] |
| geometric albedo**:** | 0.15 ± 0.045 [D03a] |
| color index U-B: | ? |
| color index B-V: | ? |
| taxonomic type**:** | S (SMASSII) [JPL] |
| mass m: | ? |
| density ρ: | (1.6 g/cm3) [*A] |
| Hill radius rH: | 570 km [*E] |
other data, primary:
| diameter dp: | 8.44 ± 1.27 km [*D] |
|---|---|
| rotation period RPp: | 2.3909 h [W17a] |
| amplitude in mag., rotational ΔM: | 0.03 [W17a] |
| pole direction Β, λ: | ? , ? |
other data, secondary:
| diameter ds: | 0.84 ± 0.44 km [*D] |
|---|---|
| diameter ratio ds/dp: | 0.1 ± 0.05 [W17a] |
| component mag. difference ΔM: | 5.0 ± 1.2 [*D] |
| rotation period RPs: | ? |