Juno observations of Io 

<p>NASA&#8217;s Juno mission has been observing the Jovian aurorae since 2016 from a polar, highly elliptical orbit.<br />Although not in the main scientific objectives, Juno took images and spectra of the Galilean moons from a<br />very favourable position, using some of the cameras on board: JIRAM, JunoCam and SRU. In particular, The<br />Jovian Infrared Auroral Mapper (JIRAM) is a dual-band imager and spectrometer. The imager channel is a<br />single detector with 2D capability and with 2 different filters (L band, from 3.3 to 3.6 &#181;m; M band, from 4.5<br />to 5 &#181;m); the spectrometer is a 1-D detector with a spectral resolution of 9 nm in the range 2 - 5 &#181;m. The<br />pixel angular resolution (0.01&#176;) is fine enough for imaging the moons from the polar, highly elliptical orbit of<br />Juno; the spatial resolution at the surface of the moons varies along the s/c distance and is of the order of<br />100 km/pixel or even finer. Here we present JIRAM&#8217;s images and spectra of Io after<br />six years of Juno mission, together with JunoCam and SRU images of Io. On Io, these observations<br />characterize the location and possible morphology, and some temperatures, of the volcanic thermal<br />sources; the identification and distribution of SO 2 , the possible identification of CO 2 and other materials.&#160;<br />Recent Juno flybys, at distance down to 50'000 km, allows unprecedented imaging of the moon with resolution of about 10 km.<br />This allows reconstructing the morphology of hot spots, and a better mapping of their distribution, in location and emitted power.</p>