# Modelling DESTINY+ interplanetary and interstellar dust measurements en route to the active asteroid (3200) Phaethon

## TL;DR

This paper models the detection of interplanetary and interstellar dust by DESTINY+ spacecraft's Dust Analyzer during its mission to asteroid Phaethon, predicting significant dust detection and potential particle origin discrimination.

## Contribution

It introduces a novel application of updated computer models to predict dust detection conditions and distinguishes between different dust particle origins during the DESTINY+ mission.

## Key findings

- Significant number of dust particles detectable during cruise
- Impact direction and speed can differentiate dust origins
- Models predict successful dust analysis during mission

## Abstract

The JAXA/ISAS spacecraft DESTINY$^+$ will be launched to the active asteroid (3200) Phaethon in 2022. Among the proposed core payload is the DESTINY+ Dust Analyzer (DDA) which is an upgrade of the Cosmic Dust Analyzer flown on the Cassini spacecraft to Saturn (Srama et al. 2011). We use two up-to-date computer models, the ESA Interplanetary Meteoroid Engineering Model (IMEM, Dikarev et al. 2005), and the interstellar dust module of the Interplanetary Meteoroid environment for EXploration model (IMEX; Sterken2013 et al., Strub et al. 2019) to study the detection conditions and fluences of interplanetary and interstellar dust with DDA. Our results show that a statistically significant number of interplanetary and interstellar dust particles will be detectable with DDA during the 4-years interplanetary cruise of DESTINY+. The particle impact direction and speed can be used to descriminate between interstellar and interplanetary particles and likely also to distinguish between cometary and asteroidal particles.