Table 1. Parameters for Toutatis.
| Property | Value |
|---|---|
| Osculating Orbital elements | a = 2.5336 AU, e = 0.6301 |
| i = 0.4466°, Ω = 124.3991° | |
| ω = 278.6910°, M = 6.7634° | |
| Special type | S (IV)5 |
| Size (diameter) Major axes | (x = 4.60 ± 0.10 km, y = 2.29 ± 0.10 km, z = 1.92 ± 0.10 km)5 |
| (x = 4.46 ± 0.10 km, y = 2.27 ± 0.10 km, z = 1.88 ± 0.10 km)9 | |
| Rotational properties | |
| Rotation | 5.4 day2,5 |
| Precession | 7.4 day2,5 |
| Pole position in the space | β = 250 ± 5°, λ = 63 ± 5° |
| β = 54.6°, λ = 60.6° 8,9 | |
| α = 258 ± 5°, δ = 40 ± 5° | |
| Density | 2.5 g cm−3 20 |
Using the data released by the Minor Planet Center34,35 and optical data from the ground-based observational campaign sponsored by the Chinese Academy of Sciences, we determined Toutatis' orbit with uncertainties on the order of several kilometers. Osculating orbital elements were calculated for the flyby epoch of 13 December 2012 at 8:30 UTC, where a, e, i, Ω, ω, and M are the semi-major axis, the eccentricity, the inclination, the longitude of the ascending node, the argument of perihelion, and the mean anomaly, respectively. β, λ and α, δ are the longitudes and latitudes of the long axis of the asteroid in the J2000.0 ecliptic and equatorial coordinate systems, respectively.