Planetary and exoplanetary Astronomy Lunch Seminar (PALS) for 2022-12-05

Series: Planetary and exoplanetary Astronomy Lunch Seminar (PALS)
Date: Monday 05-December-2022
Time: 11:15-12:15
Location: Zoom (contact for link)
Speaker: Yoonyoung Kim
Title: Active asteroids observed by Hubble Space Telescope

Abstract: Active asteroids show transient cometary activity, driven by a range of processes (sublimation, impacts, rotational breakup, and combinations of these processes). A sub-set, called main-belt comets, may be driven by sublimation and so could be useful for tracing the present-day distribution of asteroid ice. In this talk, I will introduce Hubble Space Telescope observations of newly discovered objects. I combine the high-resolution optical data with a Monte Carlo dust dynamics model to quantify the nature of the dust coma and underlying nucleus source, then determine the cause of the activity (sublimation or something else). This is important to better constrain the intrinsic ice content in the main belt.

For further information contact PALS coordinator Quanzhi Ye at


Special accommodations for individuals with disabilities can be made by calling (301) 405-3001. It would be appreciated if we are notified at least one week in advance.


Directions and information about parking can be found here.

This page was automatically generated on: 29-Nov-2022.