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JunoCam Observations of Io.

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Title: JunoCam Observations of Io.
Authors: Ravine, M. A.1 (AUTHOR) ravine@msss.com, Hansen, C. J.2 (AUTHOR), Caplinger, M. A.1 (AUTHOR), Schenk, P. M.3 (AUTHOR), Lipkaman Vittling, L.2 (AUTHOR), Krysak, D. J.1 (AUTHOR), Perry, J. E.4 (AUTHOR), Williams, D. A.5 (AUTHOR), Radebaugh, J.6 (AUTHOR), Pettine, M.7 (AUTHOR), Keane, J. T.8 (AUTHOR), Hayes, A. G.7 (AUTHOR), Rathbun, J. A.7 (AUTHOR), Lopes, R. M.8 (AUTHOR), Bolton, S. J.9 (AUTHOR)
Source: Journal of Geophysical Research. Planets. Sep2025, Vol. 130 Issue 9, p1-28. 28p.
Subject Terms: Volcanic plumes, Lava flows, Jupiter (Planet), Imaging systems, Topography, Geological maps
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. Plain Language Summary: JunoCam, the Juno spacecraft's camera, took about a hundred images of Jupiter's moon Io during encounters Juno had with Io in 2023 and 2024. Together, these images covered more than half of Io's surface, some at scales as small as 1 km per pixel. The JunoCam coverage included the areas around both of Io's poles, which were poorly covered by previous missions. Images were taken of both the day and nightsides of Io, the latter illuminated by light from Jupiter. This paper describes how JunoCam acquires color images. These Io images were used to update the geologic map of the area around Io's North Pole and estimate the heights of 16 mountains. Fourteen new plume deposits and 20 new lava flows were observed, as were eight volcanic plumes of the type previously observed erupting from the volcano Prometheus. Key Points: JunoCam imaged Io at scales as small as 1 km/pixelNorth polar region coverage was improved from previous missionsNew mountains and lava flows were identified [ABSTRACT FROM AUTHOR]
Copyright of Journal of Geophysical Research. Planets is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: JunoCam Observations of Io.
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  Data: <searchLink fieldCode="AR" term="%22Ravine%2C+M%2E+A%2E%22">Ravine, M. A.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> ravine@msss.com</i><br /><searchLink fieldCode="AR" term="%22Hansen%2C+C%2E+J%2E%22">Hansen, C. J.</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Caplinger%2C+M%2E+A%2E%22">Caplinger, M. A.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Schenk%2C+P%2E+M%2E%22">Schenk, P. M.</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Lipkaman+Vittling%2C+L%2E%22">Lipkaman Vittling, L.</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Krysak%2C+D%2E+J%2E%22">Krysak, D. J.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Perry%2C+J%2E+E%2E%22">Perry, J. E.</searchLink><relatesTo>4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Williams%2C+D%2E+A%2E%22">Williams, D. A.</searchLink><relatesTo>5</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Radebaugh%2C+J%2E%22">Radebaugh, J.</searchLink><relatesTo>6</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Pettine%2C+M%2E%22">Pettine, M.</searchLink><relatesTo>7</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Keane%2C+J%2E+T%2E%22">Keane, J. T.</searchLink><relatesTo>8</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Hayes%2C+A%2E+G%2E%22">Hayes, A. G.</searchLink><relatesTo>7</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Rathbun%2C+J%2E+A%2E%22">Rathbun, J. A.</searchLink><relatesTo>7</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Lopes%2C+R%2E+M%2E%22">Lopes, R. M.</searchLink><relatesTo>8</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Bolton%2C+S%2E+J%2E%22">Bolton, S. J.</searchLink><relatesTo>9</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Geophysical+Research%2E+Planets%22">Journal of Geophysical Research. Planets</searchLink>. Sep2025, Vol. 130 Issue 9, p1-28. 28p.
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  Data: <searchLink fieldCode="DE" term="%22Volcanic+plumes%22">Volcanic plumes</searchLink><br /><searchLink fieldCode="DE" term="%22Lava+flows%22">Lava flows</searchLink><br /><searchLink fieldCode="DE" term="%22Jupiter+%28Planet%29%22">Jupiter (Planet)</searchLink><br /><searchLink fieldCode="DE" term="%22Imaging+systems%22">Imaging systems</searchLink><br /><searchLink fieldCode="DE" term="%22Topography%22">Topography</searchLink><br /><searchLink fieldCode="DE" term="%22Geological+maps%22">Geological maps</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: 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. Plain Language Summary: JunoCam, the Juno spacecraft's camera, took about a hundred images of Jupiter's moon Io during encounters Juno had with Io in 2023 and 2024. Together, these images covered more than half of Io's surface, some at scales as small as 1 km per pixel. The JunoCam coverage included the areas around both of Io's poles, which were poorly covered by previous missions. Images were taken of both the day and nightsides of Io, the latter illuminated by light from Jupiter. This paper describes how JunoCam acquires color images. These Io images were used to update the geologic map of the area around Io's North Pole and estimate the heights of 16 mountains. Fourteen new plume deposits and 20 new lava flows were observed, as were eight volcanic plumes of the type previously observed erupting from the volcano Prometheus. Key Points: JunoCam imaged Io at scales as small as 1 km/pixelNorth polar region coverage was improved from previous missionsNew mountains and lava flows were identified [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Geophysical Research. Planets is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1029/2024JE008924
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      – Code: eng
        Text: English
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        PageCount: 28
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      – SubjectFull: Volcanic plumes
        Type: general
      – SubjectFull: Lava flows
        Type: general
      – SubjectFull: Jupiter (Planet)
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      – SubjectFull: Imaging systems
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      – SubjectFull: Topography
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      – SubjectFull: Geological maps
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      – TitleFull: JunoCam Observations of Io.
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              Text: Sep2025
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