(31345)
_dynamical type, primary:_NEA, Amor
_orbital data, primary (osculating elements)_[JPL] :
| semimajor axis a: | 2.014955130 AU |
|---|---|
| orbital period P: | 2.860264998 yr (= 1044.7117910 d) |
| eccentricity e: | 0.391553520 |
| perihelion distance q: | 1.225992357 AU |
| aphelion distance Q: | 2.803917903 AU |
| inclination i: | 6.4942996° |
| argument of perihelion ω: | 155.955286° |
| ascending node Ω: | 222.793932° |
| mean anomaly M: | 162.183243° |
| perihelion passage TP: | 2013 Feb 06.34792 |
| Epoch**:** | 2014 May 23 |
| data arc**:** | 1978-2014 (684 obs.) |
| Earth MOID**:** | 0.232775 AU |
| Jupiter Tisserand invariant TJ: | 3.72 |
orbital data, secondary:
| binary dynamical type**:** | A [M09a] |
|---|---|
| semimajor axis as: | 1.4 km [*E] |
| separation/primary radius as/rp: | 3.1 [*E] |
| separation/Hill radius as/rH: | 0.016 [*E] |
| orbital period Ps: | 0.5835 ± 0.00004 d [P06b] |
| eccentricity es: | ? |
| normalized ang. mom. αL: | 1.2 [M09a] |
other data, system (combined):
| absolute mag. H: | 17.3 [MPC]17.64 ± 0.14 [P00a] |
|---|---|
| slope parameter G: | (0.15) [*A] |
| effective diameter dE: | 0.94 ± 0.21 km [*D] |
| geometric albedo**:** | 0.18 [P06b] |
| color index U-B: | ? |
| color index B-V: | 0.81 [P00a] |
| color index V-R: | 0.44 ± 0.01 [P00a] |
| color index B-R: | 1.25 [P00a] |
| color index V-I: | 0.76 [P00a] |
| taxonomic type**:** | Sq (SMASSII) [JPL] |
| mass m: | ? |
| density ρ: | (1.6 g/cm3) [*A] |
| Hill radius rH: | 87 km [*E] |
other data, primary:
| diameter dp: | 0.9 ± 0.2 km [P06b] |
|---|---|
| rotation period RPp: | 2.51620 ± 0.00003 h [P00a] |
| amplitude in mag., rotational ΔM: | 0.11 [W14e] |
| pole direction Β, λ: | ? , ? |
other data, secondary:
| diameter ds: | 0.27 km [*D] |
|---|---|
| diameter ratio ds/dp: | 0.3 [P06b] |
| component mag. difference ΔM: | 2.6 [*D] |
| rotation period RPs: | ? |