Stellar Reference Unit (SRU) Image (IMAGE)

Southwest Research Institute

Stellar Reference Unit (SRU) Image

Caption

Juno's Radiation Monitoring Investigation collected this image of Jupiter's moon Io with Juno's Stellar Reference Unit (SRU) star camera shortly after Io was eclipsed by Jupiter at 12:40:29 (UTC) Dec. 21, 2018. Io is softly illuminated by moonlight from another of Jupiter's moons, Europa. The brightest feature on Io is suspected to be a penetrating radiation signature. The glow of activity from several of Io's volcanoes is seen, including a plume circled in the image.

Credit

NASA/JPL-Caltech/SwRI

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