JunoCam acquired three images of Io prior to when it entered eclipse, all showing a volcanic plume illuminated beyond the terminator. The image shown here, reconstructed from red, blue and green filter images, was acquired at 12:20 (UTC) on Dec. 21, 2018. The Juno spacecraft was approximately 300,000 km from Io.
NASA/SwRI/MSSS
Taken on 21 December 2018, 12:20
<a rel="nofollow" class="external free" href="https://www.swri.org/press-release/light-from-volcanoes-io-juno-jupiter-moon">https://www.swri.org/press-release/light-from-volcanoes-io-juno-jupiter-moon</a> (<a rel="nofollow" class="external text" href="https://www.swri.org/sites/default/files/media-resources/io-plume-ravine.jpg">image link</a>)