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Juno Perijove 24, December 26, 2019
mcaplinger
post Jan 3 2020, 06:01 AM
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PJ24 happened back on 12/26 but the spacecraft was in solar conjunction until around the end of the year and we are just starting to get the data back. With the holidays it may be next week before images start showing up on missionjuno, so stay tuned.


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PaulH51
post Jan 3 2020, 12:18 PM
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QUOTE (mcaplinger @ Jan 3 2020, 02:01 PM) *
.... so stay tuned.

I'm sure they're worth waiting for smile.gif

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mcaplinger
post Jan 3 2020, 10:39 PM
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The first three images from the somewhat but not very close flyby of Ganymede (it's about 78 pixels across) are up now.


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Gerald
post Jan 4 2020, 01:57 AM
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Drafts of the four PJ24 Ganymede images
and slightly post-processed crops thereof:
Attached Image


We are looking towards Ganymede's northern hemisphere.
Hershef and the nearby chain of bright crater ejecta (60 to 70E, 40 to 60N) are well-discernible, amongst other known features.

Geologic map on Wikipedia.
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Gerald
post Jan 4 2020, 08:35 PM
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Cylindrical map derived from #003 and #004:
Attached Image


Tentative names:
Attached Image


Link to maps of PJ24, #001 to #004.
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Gerald
post Jan 4 2020, 08:37 PM
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North polar hemispherical map (azimuthal, equidistant)
Attached Image


Tentatively annotated version:
Attached Image


[edit: replaced annotated map by revised version]
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Bjorn Jonsson
post Jan 7 2020, 12:26 AM
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An approximately true color/contrast version of image PJ24_004 of Ganymede enlarged by a factor of 3 (left) and a computer generated image with a latitude/longitude grid (right):

Attached Image
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palebutdot
post Jan 7 2020, 08:31 AM
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Perijove 24 Jupiter images are now trickling in!
https://www.missionjuno.swri.edu/junocam/processing?id=7951

Attached thumbnail(s)
Attached Image
 
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Kevin Gill
post Jan 7 2020, 03:02 PM
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First few Jupiter images processed from Perijove 24

PJ24-22:

Jupiter - PJ24-22

PJ24-22 (Detail):

Jupiter - PJ24-22 - Detail

PJ24-19:

Jupiter - PJ24-19


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volcanopele
post Jan 7 2020, 03:34 PM
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No plume that I can see at Chalybes (two Io swaths down)

EDIT: now including the two images of Io from PJ24. Only very broadscale bright spots are visible (Surt "Regio", the bright area near 60/330, and Ra "Regio")
Attached thumbnail(s)
Attached Image
Attached Image
 


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Bjorn Jonsson
post Jan 7 2020, 11:13 PM
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This is a heavily processed north polar projection map generated from image PJ24_17. In particular it has been processed to reveal features that are faintly illuminated by Jovian skylight on the nightside near the terminator. Processing images like this is now easier for me than it used to be thanks to a new empirical model of Jovian skylight near the terminator that is used when removing the effects of the varying illumination (I'm still tweaking the parameters though, therefore some post processing was necessary in Photoshop). This processing reveals what seems to be a part of the north polar cyclone very close to the north pole. Several circumpolar cyclones are also visible.

Attached Image
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Sean
post Jan 8 2020, 08:03 PM
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PJ24_24 Eichstadt/Doran


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Gerald
post Jan 9 2020, 03:12 AM
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Here a version of the north polar CPCs, a north polar map rotated clockwise by 37 degrees relative to 0 degrees System III to the right:
Attached Image

The center of the upper edge should be aligned to the pole.
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Gerald
post Jan 9 2020, 03:31 AM
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Links to more processed versions of PJ24 images I've uploaded thus far:
Drafts:
Ganymede
Part 2: Io, Jupiter
Part 3

Reprojections:
Part 2, gamma=1
Part 2, gamma=4
Part 3, gamma=4

Maps:
Part 2 and 3, gamma=1
Parts 2 and 3, gamma=4
Parts 2 and 3, high-passed locally contrast-normalized.

An attempt of a map of the northern hemisphere of Io, 0 degrees longitude to the bottom:
Attached Image
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Gerald
post Jan 9 2020, 03:46 AM
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Here a forth-back animation of the northern CPCs:
Attached Image

Noteworthy the slowdown of the angular velocity towards the center of at least some of the northern CPCs.
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