In our previous work, we investigated the orbital dynamics of Asteroid 1934 CT (or 1989 AC or 4179 Toutatis) from epoch 2012-Jul-24 (JDE2456132.5) using the Mercury program package. Asteroid 4179 Toutatis has an Earth and Mars crossing orbit with semimajor axis a = 2.5292 AU and eccentricity e = 0.6294, and therefore the perihelion distance is q = 0.9373 AU and the aphelion distance is Q = 4.1211 AU. After more than 300,000 years, asteroid 4179 Toutatis will escape from the Solar System, but during this time, it will have close-encounters with other planets from Venus to Uranus. As a continuation of this project, we investigated its energy changes in each close encounter. We also determine the energy of this asteroid when it escapes from the Solar System. The result is that during its orbital evolution, the energy of this asteroid changes and gives us negative, zero and positive values.

ABSTRACT
1. INTRODUCTION
2. THE ORBIT OF 4179 TOUTATIS
    2.1. The Numerical Integration
    2.2. Integration Parameter
    2.3. Tisserand Parameter for Asteroid 1566 Icarus
    2.4. Close Encounters
3. CONCLUSIONS
REFERENCES

• Endang Soegiartini(Department of Astronomy, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung)