PJ57 Predict Map

By Tom on 2023-12-21 UT
PJ57 Predict Map
PJ57 Predict Map

 

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  1. comment by Philosophia-47 on 2024-01-30 12:53 UT

    Here are the full-size figures to accompany my report on the PJ57 images of Io.

    --John Rogers

  2. comment by Philosophia-47 on 2024-01-30 12:52 UT

    The PJ57 images of Io are superb!  Here is a report on them.  

    The JunoCam team have managed to cure the 'streaky noise' problem that developed at PJ56, at least for now.  The Io images are the first closeup views of the volcanic moon for 22 years. Moreover, most of the “dark side” was well illuminated by light reflected from the planet. So JunoCam completed the mapping of Io’s hitherto-unknown north polar region. Notably, it obtained the first good images of several impressive high mountains that had never been properly resolved before,  and also of several northerly calderas that are volcanic hot spots. (No volcanic plumes were visible in the images.)

    The report includes a global map from the PJ57 images by Jason Perry, which shows the relationships of mountains and volcanoes much better than the Voyager or Galileo maps. No large changes are seen since the Voyager and Galileo mapping. (Colour and brightness of surfaces on Io can vary greatly with the lighting and viewing angles, and with the camera filters used, so many apparent differences are likely due to these factors.) However, local changes are seen around some of the volcanic hot spots, including Chors, Tonatiuh, and Loki; details of these are given in the report. 

    --John Rogers