Toutatis

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Toutatis
Toutatis is an Apollo asteroid with a chaotic orbit produced by a 3:1 resonance with the planet Jupiter, a 1:4 resonance with the planet Earth, and frequent close approaches to the terrestrial planets, including Earth. With its close approaches, and being about 4.6 km across, it is listed as a potentially hazardous object, although the probability of a collision with Earth is minute. The spectral properties suggest that this is an S-type, or stony asteroid, consisting primarily of silicates. It has a moderate Bond albedo of 0.13. Radar imagery shows that Toutatis is a highly irregular body consisting of two distinct "lobes", with maximum widths of about 4.6 km and 2.4 km respectively. It is hypothesized that Toutatis formed from two originally separate bodies which coalesced at some point, with the resultant asteroid being compared to a "rubble pile". 4179 Toutatis - Wikipedia, the free encyclopedia
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Short Description Toutatis is an Apollo asteroid with a chaotic orbit produced by a 3:1 resonance with the planet Jupiter, a 1:4 resonance with the planet Earth, and frequent close approaches to the terrestrial planets, including Earth. With its close approaches, and being about 4.6 km across, it is listed as a potentially hazardous object, although the probability of a collision with Earth is minute. The spectral properties suggest that this is an S-type, or stony asteroid, consisting primarily of silicates. It has a moderate Bond albedo of 0.13. Radar imagery shows that Toutatis is a highly irregular body consisting of two distinct "lobes", with maximum widths of about 4.6 km and 2.4 km respectively. It is hypothesized that Toutatis formed from two originally separate bodies which coalesced at some point, with the resultant asteroid being compared to a "rubble pile". 4179 Toutatis - Wikipedia, the free encyclopedia
Discovered by Christian Pollas
Discovery date 4 January 1989
Type Asteroid
AddInfo Apollo group
Satellite of Sun
Minor planet number 4179
Orbit Prograde
Rotation Direct
Apoapsis 09 617 780 000 km
Periapsis 09 140 519 000 km
Semi-major axis 09 379 140 000 km
Distance from Sun 01 2.534 4 au
Eccentricity 0.629 38
Orbital period 4.03 year | 1473.7 days
Orbital speed  16.69 km/s
Mean anomaly 281.88°
Inclination to the ecliptic 000.44712°
Longitude of the ascending node 124.37°
Argument of periapsis 278.73°
Diameter/Size 01 5.4 km
Dimensions 4.75×2.4×1.95 km (±10%)
Mass 1013×5.0 kg
Density 01 2.1 g/cm3
Surface gravity  0.0010 m/s2
Escape velocity 01 1.9 m/s
Rotation period 176 hours | 7.3 days
Albedo geometric 0.13
Temperature mean 02 174 K | −99 °C
Apparent magnitude 8.8 to 22.4
Absolute magnitude 15.30
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