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Juno-UVS Observations of High-Altitude Ultraviolet Streaks near Jupiter’s Equator at Dawn

Presentation #326.01 in the session Origin and Evolution of Giant Planet Systems II (Poster)

Published onOct 23, 2023
Juno-UVS Observations of High-Altitude Ultraviolet Streaks near Jupiter’s Equator at Dawn

Juno-UVS is an ultraviolet imaging spectrograph onboard the Juno spacecraft currently in orbit around Jupiter. The instrument has a bandpass of 70 - 205 nm and is primarily used to observe UV emission from the Jovian auroras during each close pass to the north and south polar regions of the planet, but the instrument also observes a variety of other sources in the UV, including reflected sunlight from Jupiter. During one of the recent observations near perijove (PJ 48), Juno-UVS detected faint streaks of ultraviolet scattering and/or emission from a region spanning 2-12°N latitude and 206-218°W longitude. The features were located along the dawn terminator at the time of the observations. We present initial analysis of these ultraviolet streaks and discuss potential processes that led to their formation, as well as provide an overview of past and future times when Juno-UVS did or will observe this near equatorial region under similar illumination conditions at dawn or dusk.

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