Online Colloquium
Friday, 19 March 2021, at 01.00-02.30 p.m (UT+7)

I Putu Wira Hadiputrawan, M. Sc

NCU, Taiwan

We invite all colloquium enthusiasts to join via the Zoom link (limited to 100 participants)::
Meeting ID: 839 3276 6803
Passcode: AstroITB

or via Youtube live stream:

Thank you for your attention and active participation.

Colloquium coordinator,

Dr. Anton Timur Jaelani


A key feature of the architecture of the Kuiper belt outside the orbit of Neptune has to do with the presence of objects trapped in different mean-motion resonances with Neptune. The dwarf planet, Pluto, in 3:2 resonance with Neptune is the most outstanding representative. Accompanying Pluto, there are many KBOs, called Plutinos, also have the same orbital relation with Neptune. According to the theory of planetary orbital migration, Pluto and Plutinos and other groups were captured into the 3:2, 4:3. 5:3, 2:1 and 5:2 resonances by the outward orbital drift of Neptune. In this study, we explored the possibility of the existence of multiple Pluto-sized (or bigger) objects in the 3:2 resonance and the corresponding dynamical effects on the structure of the Kuiper belt. Besides serving as a probe to the chaotic evolutionary history of the early solar system, this scenario is also of interest to the emerging topic of scattering process of dwarf planets in debris disks. Our results lead into conclusion that perhaps after Neptune migrated outward, the initial number of large planetoids in the disk region from 10 to 50 au that to be captured into resonance area with Neptune could be smaller than 10. For future work, this result can be used to determine the boundary condition for another set of long-term simulations.