1,1,1,3,4,5,5,6,7,8,- 1The Johns Hopkins University Applied Physics Laboratory, Space Exploration Sector, Laurel, United States of America (pontus.brandt@jhuapl.edu)
- 2The Swedish Institute of Space Physics, Kiruna, Sweden
- 3Southwest Research Institute, San Antonio, TX, USA
- 4University of Bern, Bern, Switzerland
- 5Max Planck Institute for Solar System Research, Gottingen, Germany
- 6University of Oregon, Eugene, OR, USA
- 7University of Michigan, Ann Arbor, MI, USA
- 8University of California Los Angeles, Los Angeles, CA, USA
- 9IRAP, Toulouse, France
ESA’s JUpiter ICy moons Explorer (JUICE) mission performed the world’s first Lunar-Earth flyby on the 19-20 of August 2024, successfully rerouting the spacecraft toward Venus for another gravity assist. In October and November 2025 the JUICE payload also attempted observations of the interstellar comet 3i/ATLAS. In this presentation, we focus on observations obtained from the Jupiter Energetic Neutrals and Ions (JENI) camera and the Jovian Energetic Electron (JoEE) magnetic spectrometer, which are a part of the comprehensive JUICE Particle Environment Package (PEP).
The Lunar-Earth flyby brought JUICE to within ~750 km of the Moon’s surface and ~6,840 km over Earth. JUICE flew through Earth’s magnetotail visiting the plasma sheet, ring current, and radiation belt regions, before exiting the magnetosphere along the flank bringing the spacecraft back into the solar wind. JENI and JoEE made direct measurements of the energetic ions (~1 keV to several MeV) and electrons (~30 keV to 2 MeV) in those magnetospheric regions. During its outbound leg of the trajectory, JENI captures high-resolution images of Earth’s dynamical ring current. Several substorm injections of hot plasma were observed in Earth’s nightside.
In the period 8-19 November was allowed to be on attempting ENA imaging of 3i/ATLAS and data will be downlinked by February 2026. In this presentation, we report on these exciting observations captured by JUICE discuss the instrument performance of JENI and JoEE.
How to cite: Brandt, P., Clark, G., Kollmann, P., Mitchell, D., Regoli, L., Gkioulidou, M., Barabash, S., Allegrini, F., Wurz, P., Krupp, N., Roussos, E., Paty, C., Jia, X., Khurana, K., Andre, N., and Turner, D.: Results from ESA’s JUICE Cruise: ENA Imaging and In-Situ Charged Particle Measurements During Lunar-Earth Gravity Assist and the 3i/ATLAS Observation Window, EGU General Assembly 2026, Vienna, Austria, 3–8 May 2026, EGU26-21237, https://doi.org/10.5194/egusphere-egu26-21237, 2026.
