Help - Search - Members - Calendar
Full Version: Juno Perijove 21
Unmanned Spaceflight.com > Outer Solar System > Jupiter > Juno
Brian Swift
Collage of PJ21 initial downlink images. Full rez 13902x9218 8-bit JPG available on flickr. 16-bit PNG uploaded to missionjuno.
Junocam PJ21 Preliminary Download Collage
Brian Swift
Mike, is there an explanation for the occasional missing frame seen at the beginning of some of the "wide" (~180 spin) raw images?
Kevin Gill
A couple of angry looking storms visible


Jupiter - PJ21-17 - Detail



Jupiter - PJ21-18 - Detail



Jupiter - PJ21-19 - Detail
mcaplinger
QUOTE (Brian Swift @ Jul 23 2019, 03:41 PM) *
Mike, is there an explanation for the occasional missing frame seen at the beginning of some of the "wide" (~180 spin) raw images?

Looks to me like our ground data system didn't command quite enough frames to catch the top limb of the planet in the red channel -- maybe it incorrectly assumes there can't be more than 40 frames in a nadir-centered image, which due to roundoff is not quite true. I'll take a look at it.
Bjorn Jonsson
This is a preliminary map-projected version of image PJ21_26. The Great Red Spot in on the limb in the original raw image, therefore a part of it is 'missing' here and Jupiter's sky is visible with huge vertical exaggeration. Approximately true color/contrast.

Click to view attachment
mcaplinger
Be patient, the GRS views get better. We're still having some data dropout problems, I'd expect another push of images tomorrow.
mcaplinger
Nearly all of the PJ21 images are on missionjuno now -- one image is still partial AFAIK.
Kevin Gill
Ah, Juno got nice view of the Great Red Spot. Some preliminary processing of it:


Jupiter - PJ21-36



Jupiter - PJ21-32/36/39/40
Kevin Gill
A couple composite views:

JNCE_2019202_21C00010_V01
JNCE_2019202_21C00012_V01
JNCE_2019202_21C00013_V01
JNCE_2019202_21C00014_V01
JNCE_2019202_21C00015_V01:


Jupiter - Perijove 21 - Composite


JNCE_2019202_21C00015_V01
JNCE_2019202_21C00017_V01:


Jupiter - PJ21-15/17


JNCE_2019202_21C00014_V01
JNCE_2019202_21C00015_V01
JNCE_2019202_21C00017_V01
JNCE_2019202_21C00018_V01
JNCE_2019202_21C00019_V01:


Perijove 21 - Composite


JNCE_2019202_21C00032_V01
JNCE_2019202_21C00036_V01
JNCE_2019202_21C00039_V01
JNCE_2019202_21C00040_V01
JNCE_2019202_21C00041_V01
JNCE_2019202_21C00042_V01
JNCE_2019202_21C00043_V01
JNCE_2019202_21C00044_V01
JNCE_2019202_21C00045_V01:


Jupiter - Perijove 21
Sean
PJ21_16 [GE/SD]




mcaplinger
QUOTE (Kevin Gill @ Jul 25 2019, 02:01 PM) *
Ah, Juno got nice view of the Great Red Spot. Some preliminary processing of it...

Beautiful work as always, Kevin. Interesting to compare this to what Damien Peach saw back in June -- http://damianpeach.com/jup19/2019-06-03-0500_3-RGBdp.jpg -- doesn't look all that different except that scalloped stuff to the east seems to have smoothed out.
Kevin Gill
QUOTE (mcaplinger @ Jul 26 2019, 01:57 PM) *
Beautiful work as always, Kevin. Interesting to compare this to what Damien Peach saw back in June -- http://damianpeach.com/jup19/2019-06-03-0500_3-RGBdp.jpg -- doesn't look all that different except that scalloped stuff to the east seems to have smoothed out.



Well, it's interesting... In not-very-scientific measurements from Perijoves 7, 12, 18, & 21, there appears to be a measurable longitudinal shrinking of the GRS:


Perijove 7: 16,094 km
Click to view attachment


Perijove 12: 15,898 km
Click to view attachment


Perijove 18: 15,627 km
Click to view attachment


Perijove 21: 15,149 km
Click to view attachment

Click to view attachment
With a linear decline in width up to Perijove 18, then a sharper decline to Perijove 21 which matches the timing of the detachments observed by Damien Peach.
Bjorn Jonsson
QUOTE (mcaplinger @ Jul 25 2019, 08:26 PM) *
Nearly all of the PJ21 images are on missionjuno now -- one image is still partial AFAIK.

I noticed that there is no image number 33 at the MissionJuno website. Is that the one that is still partial? If there is an image number 33 that's actually probably a very interesting image that should show areas north and/or west of the GRS very well.

QUOTE (Kevin Gill @ Jul 26 2019, 07:29 PM) *
With a linear decline in width up to Perijove 18, then a sharper decline to Perijove 21 which matches the timing of the detachments observed by Damien Peach.

Something comparable has also been measured from ground based images, see http://alpo-j.asahikawa-med.ac.jp/kk19/j190624r.htm and http://pianeti.uai.it/index.php/Jupiter:_2019_Animated_gif
mcaplinger
QUOTE (Bjorn Jonsson @ Jul 26 2019, 03:27 PM) *
I noticed that there is no image number 33 at the MissionJuno website. Is that the one that is still partial? If there is an image number 33 that's actually probably a very interesting image that should show areas north and/or west of the GRS very well.

Correct. Image 33 taken 04:32:27. The dropout is small but goes right across the GRS in one channel (of course.) I'd expect it to be pushed by mid-week next week one way or another.
mcaplinger
QUOTE (mcaplinger @ Jul 27 2019, 08:13 AM) *
I'd expect it to be pushed by mid-week next week one way or another.

The last image from PJ21 is on missionjuno now.
Bjorn Jonsson
QUOTE (mcaplinger @ Jul 29 2019, 08:09 PM) *
The last image from PJ21 is on missionjuno now.

Awesome - thanks. This image is even more interesting/better than I was expecting it to be.
Kevin Gill
A quick GRS and Areas West map view using the '33 data:

Uses: JNCE_2019202_21C00033_V01, JNCE_2019202_21C00036_V01, JNCE_2019202_21C00039_V01


Jupiter - Great Red Spot - PJ21-32/33/36
Kevin Gill
And a fish-eye marble view of areas west of the GRS.

Uses:
JNCE_2019202_21C00032_V01
JNCE_2019202_21C00033_V01
JNCE_2019202_21C00036_V01
JNCE_2019202_21C00039_V01
JNCE_2019202_21C00040_V01
JNCE_2019202_21C00041_V01
JNCE_2019202_21C00042_V01



Jupiter - Perijove 21 - GRS Composite

Brian Swift
AR Quick Look globes for PJ21 (viewable in Safari on devices running iOS 12 or later) at:
Click to view attachmentmandelbits.com/arworlds
Explorer1
Just for comparison, a lovely Hubble view (taken June 27) has been released:

https://spacetelescope.org/images/heic1914a/
Bjorn Jonsson
I posted a PJ21 Great Red Spot (GRS) mosaic in a different thread which also contains GRS mosaics from earlier perijoves. A bigger version of the mosaic covering a bigger area can be found at the Juno website.

Below are enhanced images showing specific features from the mosaic. The first one shows the convective storms west and northwest of the GRS. It has been processed to reveal subtle features within the very bright convective feature northwest of the GRS. The second one shows the STB spectre.

Click to view attachment
Click to view attachment
Brian Swift
Jupiter flyover Time-lapse | 4K, 60FPS
https://youtu.be/798Nju8-4Tw
Click to view attachment
Kevin Gill
PJ21 Flyover video. Certainly not perfect. Motion tracks spice data, but camera rotation does not.


Jupiter - Perijove 21 in One Minute

And on YouTube @ 4K: https://www.youtube.com/watch?v=KhG5nXJLW4M
This is a "lo-fi" version of our main content. To view the full version with more information, formatting and images, please click here.
Invision Power Board © 2001-2019 Invision Power Services, Inc.