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Related Experiment Video

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Emission Spectroscopic Boundary Layer Investigation during Ablative Material Testing in Plasmatron

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The Dimorphos ejecta plume properties revealed by LICIACube.

E Dotto¹, J D P Deshapriya², I Gai³

¹Osservatorio Astronomico di Roma, INAF, Rome, Italy. elisabetta.dotto@inaf.it.

|February 28, 2024

Summary

The Double Asteroid Redirection Test (DART) mission successfully impacted Dimorphos, creating a large ejecta plume. LICIACube data revealed the plume

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Published on: February 27, 2013

Area of Science:

Planetary Science
Astrophysics
Space Mission Operations

Background:

The Double Asteroid Redirection Test (DART) mission aimed to test asteroid deflection technologies.
Dimorphos, a satellite of Didymos, was the target of the DART impact on September 26, 2022.
Previous observations indicated significant brightening and ejecta production post-impact.

Purpose of the Study:

To analyze the detailed characteristics of the ejecta plume generated by the DART impact on Dimorphos.
To provide high-resolution, close-proximity observations of the immediate aftermath of an asteroid impact.
To understand the dynamics and composition of asteroid ejecta for planetary defense.

Main Methods:

Utilized the LUKE and LEIA instruments aboard the LICIACube cube satellite for observation.
Collected data from 71 seconds before impact to 320 seconds after impact.
Analyzed the morphology, color, and velocity of the ejecta plume.

Main Results:

The ejecta plume formed a cone with a 140° aperture angle.
The plume exhibited a color gradient, blue near Dimorphos and redder further away.
Ejecta velocities ranged from tens to approximately 500 meters per second, with a complex, inhomogeneous structure including filaments and boulders.

Conclusions:

The DART impact generated a substantial and complex ejecta plume, consistent with asteroid impact physics.
LICIACube provided unprecedented close-up data on the immediate ejecta dynamics.
Findings contribute to understanding impact processes and refining planetary defense strategies.