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Io Images

By Candy on 2018-08-03 UT

In an elliptical polar orbit Juno does not get particularly close to the galilean satellites.  In the current mission plan the spacecraft is <400,000 km from Io 22 times.  It is <300,000 km from Io just 8 times.  Our closest flyby will be at PJ33 with a range of ~145,000 km.

We do not have the planning tools to precisely time our images of Io so we simply take a "full-spin" image.  That means we image 360 deg of sky, which also includes Jupiter.  The metadata on the image gallery page is for Jupiter, not Io.

In this section I'll record a few simple geometric parameters for the Io images.  These are not precise for the moment the image was taken, so if you are planning to do more sophisticated analysis please use spice kernels.

7 Comments

  1. comment by Philosophia-47 on 2019-04-01 15:20 UT

    JunoCam obtained north polar views of Io at PJ17 and PJ18, in each case showing a volcanic plume from Chalybes Regio shining bright over the terminator.  They can be seen in the posted reports in the PJ17 and PJ18 pages of this Think Tank.  At PJ17 there was also a Mission Juno press release.

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  2. comment by Candy AUTHOR on 2018-08-03 23:30 UT
    JUNO SPECIALIST

    The PJ13 Io images were acquired at 2018-05-24 T07:46 and T07:50 (two exposures). Approximate geometric values for the images are:

    Range: 548,440 km

    Phase angle: 119 deg

    Subs/c latitude: 27 S

    Subs/c longitude: 358 W

    The image was processed by Roman Tkachenko.

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  3. comment by Candy AUTHOR on 2018-08-03 23:19 UT
    JUNO SPECIALIST

    The PJ12 Io images were acquired at 2018-04-01 T08:07 and T11:37. Approximate geometric values for the images are:

    Range: 550,000 / 520,000 km

    Phase angle: 114 / 78 deg

    Subs/c latitude: 19N / 27S

    Subs/c longitude: 9 / 3 W

    The image acquired at 08:07 was processed by Roman Tkachenko.

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    • comment by Candy AUTHOR on 2018-08-03 23:51 UT
      JUNO SPECIALIST

      The image at 11:37 was originally planned as a Ganymede image

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  4. comment by Candy AUTHOR on 2018-08-03 22:55 UT
    JUNO SPECIALIST

    The PJ10 Io image was acquired at 2017-12-16 T14:07. Approximate geometric values are:

    Range: 477348 km

    Phase angle: 68 deg

    Subs/c latitude: 31 N

    Subs/c longitude: 46 W

    The Io image was processed by Roman Tkachenko and Kevin M. Gill, resp.

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  5. comment by Candy AUTHOR on 2018-08-03 22:31 UT
    JUNO SPECIALIST

    The PJ8 Io image was acquired at 2017-09-01T17:59.  Approximate geometric values are:

    Range:  281804 km

    Phase angle:  77 deg

    This image was processed by Roman Tkachenko.

    Subs/c latitude:  67N

    Subs/c longitude:  11 W

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