JunoCam Observations of Io
Abstract During multiple Juno encounters with Io in 2023 and 2024, the spacecraft's imaging system, JunoCam, acquired approximately one hundred images of Io. These images have a range of scales down to 1 km per pixel, and covered more than half of Io's surface, including the previously poorly resolved northern and southern polar regions. Some of the highest resolution images were acquired of Io's nightside, illuminated by Jupiter‐shine. Here we provide an overview of the JunoCam Io data set and discuss the peculiarities of JunoCam's “pushframe” imaging. Using JunoCam's high resolution coverage of the northern polar region, we have developed an improved geologic map of this previously poorly resolved area, and estimated the heights of 16 previously unidentified or poorly imaged mountains. In the higher resolution images, 14 new or modified plume deposits were identified, as were at least 20 probable new lava flows. Eight “Prometheus‐type” volcanic plumes were identified, five of which were associated with areas showing flow‐like surface changes.
Authors
- A. G. Hayes
- M. A. Caplinger (ORCID: https://orcid.org/0009-0005-1707-9004)
- M. A. Ravine (ORCID: https://orcid.org/0000-0003-4810-7352)
- Leslie Lipkaman (ORCID: https://orcid.org/0000-0001-9151-5277)
- D. A. Williams (ORCID: https://orcid.org/0000-0002-7930-9347)
- R. M. C. Lopes (ORCID: https://orcid.org/0000-0002-7928-3167)
- Jason Perry (ORCID: https://orcid.org/0000-0002-6802-7889)
- P. Schenk (ORCID: https://orcid.org/0000-0003-1316-5667)
- Madeline Pettine (ORCID: https://orcid.org/0000-0003-1359-0372)
- J. T. Keane (ORCID: https://orcid.org/0000-0002-4803-5793)
- J. Radebaugh (ORCID: https://orcid.org/0000-0002-7022-892X)
- C. J. Hansen (ORCID: https://orcid.org/0000-0001-5863-299X)
- Daniel Krysak (ORCID: https://orcid.org/0000-0001-7503-8263)
- J. A. Rathbun (ORCID: https://orcid.org/0000-0001-7619-652X)
- S. J. Bolton (ORCID: https://orcid.org/0000-0002-9115-0789)
Institutions
- Brigham Young University (US)
- Southwest Research Institute (US)
- Planetary Science Institute (US)
- Jet Propulsion Laboratory (US)
- University of Arizona (US)
- Cornell University (US)
- Malin Space Science Systems (United States) (US)
- Arizona State University (US)
- Lunar and Planetary Institute (US)
Publication Details
- Journal
- Journal of Geophysical Research Planets
- Published
- 2025-09-01
- DOI
- https://doi.org/10.1029/2024je008924
- Citations
- 3
- Primary Topic
- Astro and Planetary Science
- Type
- article
- Field-Weighted Citation Impact
- 3.46
Funders
- National Aeronautics and Space Administration
- California Institute of Technology
- Southwest Research Institute
- Jet Propulsion Laboratory