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Rev 20 Iapetus Non-targeted Jan 25,06, Flyby Discussion
Decepticon
post Jan 4 2006, 06:16 PM
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QUOTE
Here's what extrapolating the current SPICE kernels yields:

IAPETUS 2005 NOV 12 14:34:49 185078153 415,451 km arcmin=12.1
IAPETUS 2006 JAN 25 21:13:08 191495653 873,345 km arcmin=5.7

IAPETUS 2006 APR 11 17:16:28 198047853 602,419 km arcmin=8.3
IAPETUS 2007 SEP 10 12:31:28 242699553 1,259 km arcmin=2186.8

Posted by jmknapp


This time a little further out.

Jan. 2006 - 879,000 km - 5.3 km/pixel - eastern Cassini Region and transition zone, part ofthe "moat" posted by VP


If anyone has made a animation of the encounter please post it!
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Decepticon
post Jan 21 2006, 07:27 PM
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Looks like something whizzed by the camera on this shot.

http://saturn1.jpl.nasa.gov/multimedia/ima...7/N00048883.jpg
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ugordan
post Jan 21 2006, 07:33 PM
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QUOTE (Decepticon @ Jan 21 2006, 08:27 PM)
Looks like something whizzed by the camera on this shot.

Cosmic ray hit.


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TritonAntares
post Jan 23 2006, 10:46 PM
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Two new Iapetus images released. cool.gif

Here is one:
Attached Image

Date: 01/22/06
Distance: 1.280.080 km

Remarkable is the 'white mountain' in the southeastern part of the disk.
Probably the centralpeak of a 'rotten' bassin.

There are also some former unknown craters visible at the terminator.
The rifts - visible in this attached november picture...
Attached Image

Date: 11/10/05
Distance: 639.972 km
...- aren't clearly visible until now.
But some similar structures are recognizable in the bright region east of CR. wink.gif

Bye.
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TritonAntares
post Jan 24 2006, 11:11 PM
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Another series of 49 Iapetus images has been released. cool.gif
More here...

Four takeouts:
Attached Image

Date: 01/22/06
Distance: 1.226.480 km
Filters: CL1 and CL2

Attached Image

Date: 01/22/06
Distance: 1.226.482 km
Filters: CL1 and CL2

Attached Image

Date: 01/23/06
Distanz: 1.098.263 km km
Filters: P120 and GRN

Attached Image

Date: 01/23/06
Distanz: 1.098.263 km km
Filters: CL1 and CL2

Enormous is the hight of the centralpeak of Snowman A...
...probably 15-25 km !!!

The mentioned 'white mountain' is also detectable in Jan.23 images.

There are some valleys/rifts/graben visible running from NW to SO east of CR.
Also two overlapping craters may be south of Snowman A.
You can recognize two parallel dark markings, the shadows of the western crater rims.
--------------------------------------------------------------------------------------------------
Additionally a simulation with data for this far-encounter:

Attached Image

Unfortunately Solar System Simulator v4.0 is only using a poorly painted Iapetus-map... sad.gif
Someone should update this... wink.gif

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ugordan
post Jan 25 2006, 07:04 PM
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Check out this Jan 24 image from 954 000 km. What topography can produce a feature at the bottom of the disk, along the terminator? One of the huge impact basins?
Attached Image


That sure is one lumpy moon.


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TritonAntares
post Jan 25 2006, 07:50 PM
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QUOTE (ugordan @ Jan 25 2006, 09:04 PM)
Check out this Jan 24 image from 954 000 km. What topography can produce a feature at the bottom of the disk, along the terminator? One of the huge impact basins? ...
*

Attached Image

Date: 11/24/06
Distance: 910.020 km
Filters: CL1 and CL2

This 'white mountain' is really curious;
it's still in sunlight, where other parts at this longitude are in shadow.
Doesn't really look like the centralpeak of a larger crater... huh.gif
I wonder what happened there...
Attached Image

~ 3x enlarged
QUOTE (ugordan @ Jan 25 2006, 09:04 PM)
...That sure is one lumpy moon.
*

For sure... cool.gif

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TritonAntares
post Jan 26 2006, 08:12 PM
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13 new Iapetus images released;
one takeout:

Attached Image

Date: 11/25/06
Distance: 879.656 km
Filters: CL1 and IR1

This 'white mountain' is still visible... huh.gif blink.gif
I've never seen such a deformed terminator on a planetary body without atmosphere of this size...
Look at the shape at the left side of the disk, there is clear detectable bulge over CR.

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jmknapp
post Jan 27 2006, 03:26 PM
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QUOTE (TritonAntares @ Jan 26 2006, 04:12 PM)
13 new Iapetus images released;
one takeout:

Attached Image

Date: 11/25/06
Distance: 879.656 km
Filters: CL1 and IR1

This 'white mountain' is still visible... huh.gif  blink.gif
*


Here's web page showing the orientation of the disk with lat/lon lines: Iapetus file 61859

In polar projection, the red circle below marks the approximate location of the "white mountain" region:



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TritonAntares
post Jan 27 2006, 05:06 PM
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QUOTE (jmknapp @ Jan 27 2006, 05:26 PM)
In polar projection, the red circle below marks the approximate location of the "white mountain" region:
*

Cool projection... biggrin.gif
Now the map is much easier to interpret at those high latitudes,
but there is some 'terra incognita' left to speculate...

Many Thanks, Joe. cool.gif

11 new Japetus images released...

Two takeouts:
Attached Image

Date: 11/26/06
Distance: 890.982 km
Filters: CL1 and IR3

Attached Image

Date: 11/26/06
Distance: 891.194 km
Filters: CL1 and CL2

Really deformed terminator... blink.gif

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jmknapp
post Jan 28 2006, 11:52 AM
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QUOTE (TritonAntares @ Jan 27 2006, 01:06 PM)
Now the map is much easier to interpret at those high latitudes,
but there is some 'terra incognita' left to speculate...
*


Even the terra cognita is a bit lacking in detail. In April there's an opportunity to get a bit of the south polar region, but as far as I can tell from the info in the SPICE kernels, they do not plan to image Iapetus then. Here's a predicted view:




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TritonAntares
post Feb 2 2006, 08:17 PM
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QUOTE (jmknapp @ Jan 28 2006, 01:52 PM)
...
In April there's an opportunity to get a bit of the south polar region,
but as far as I can tell from the info in the SPICE kernels, they do not plan to image Iapetus then.
Here's a predicted view:

News concerning the April 11 far-encounter:
Tilmann Denk told me there are 35 sequences planned between March 25 and April 18.

Additionally a Solar System Simulator v4.0 animation with data for this event:
Attached Image

Unfortunately this simulator is only using this poorly painted Iapetus-map... sad.gif
It should really be updated... wink.gif

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TritonAntares
post Feb 3 2006, 11:40 AM
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Greuti - a member of a german forum - kindly simulated this with Celestia:
Attached Image

japetus_april.avi
Thanks Greuti.

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Posts in this topic
- Decepticon   Rev 20 Iapetus Non-targeted Jan 25,06   Jan 4 2006, 06:16 PM
- - Decepticon   If possible can a MOD fix my date I put 15th inste...   Jan 4 2006, 06:20 PM
- - volcanopele   Fixed   Jan 4 2006, 07:20 PM
- - Decepticon   Sorry I sould have said in topic heading, the enco...   Jan 4 2006, 08:59 PM
|- - volcanopele   QUOTE (Decepticon @ Jan 4 2006, 01:59 PM)Sorr...   Jan 4 2006, 09:07 PM
- - jmknapp   QUOTE (Decepticon @ Jan 4 2006, 02:16 PM)If a...   Jan 5 2006, 04:30 PM
- - Bjorn Jonsson   QUOTE (Decepticon @ Jan 4 2006, 06:16 PM)If a...   Jan 5 2006, 04:57 PM
|- - TritonAntares   Here the planned ISS-observations between january ...   Jan 8 2006, 09:25 PM
|- - TritonAntares   Some additional information: Start UTC __________...   Jan 8 2006, 11:56 PM
- - scalbers   Speaking of Iapetus maps, I'm fine-tuning an u...   Jan 9 2006, 07:42 PM
- - Decepticon   Very Nice!   Jan 10 2006, 12:30 AM
|- - Michael Capobianco   Yes, this map shows the dotted line north of the m...   Jan 10 2006, 01:07 AM
|- - JRehling   QUOTE (Michael Capobianco @ Jan 9 2006, 05:07...   Jan 10 2006, 02:22 AM
|- - jmknapp   QUOTE (JRehling @ Jan 9 2006, 10:22 PM)The re...   Jan 10 2006, 11:22 AM
||- - JRehling   QUOTE (jmknapp @ Jan 10 2006, 03:22 AM)The in...   Jan 10 2006, 07:39 PM
|- - scalbers   QUOTE (JRehling @ Jan 10 2006, 02:22 AM)Even ...   Jan 11 2006, 01:18 AM
||- - TritonAntares   QUOTE (scalbers @ Jan 11 2006, 03:18 AM)It lo...   Jan 11 2006, 11:05 AM
||- - JRehling   QUOTE (TritonAntares @ Jan 11 2006, 03:05 AM)...   Jan 12 2006, 05:49 AM
||- - Michael Capobianco   I spent an hour trying to make a stereo image from...   Jan 12 2006, 05:54 PM
|- - Tom Tamlyn   QUOTE (JRehling @ Jan 9 2006, 09:22 PM)A pure...   Jan 12 2006, 04:24 AM
- - BruceMoomaw   Well, during the planning for the primary mission ...   Jan 10 2006, 03:13 AM
- - alan   QUOTE (Michael Capobianco @ Jan 9 2006, 07:07...   Jan 10 2006, 04:20 AM
|- - Michael Capobianco   Very interesting explanation. I'm not convince...   Jan 10 2006, 07:03 PM
- - volcanopele   Another reasonable explanation for bright, polewar...   Jan 10 2006, 07:18 PM
|- - jmknapp   QUOTE (volcanopele @ Jan 10 2006, 03:18 PM)An...   Jan 10 2006, 07:46 PM
|- - volcanopele   QUOTE (jmknapp @ Jan 10 2006, 12:46 PM)Do you...   Jan 10 2006, 08:02 PM
|- - jmknapp   QUOTE (volcanopele @ Jan 10 2006, 04:02 PM)Ga...   Jan 13 2006, 02:16 PM
- - elakdawalla   I listened to a couple of talks at DPS that had be...   Jan 10 2006, 07:58 PM
|- - The Messenger   QUOTE (elakdawalla @ Jan 10 2006, 12:58 PM)I ...   Jan 10 2006, 10:18 PM
|- - tasp   QUOTE (elakdawalla @ Jan 10 2006, 01:58 PM)I ...   Jan 11 2006, 12:36 AM
- - Rob Pinnegar   The notion posted above, regarding Hyperion's ...   Jan 11 2006, 02:24 PM
|- - ugordan   It seems to me thermal conditions on Hyperion...   Jan 11 2006, 02:51 PM
||- - JRehling   QUOTE (ugordan @ Jan 11 2006, 06:51 AM)As far...   Jan 11 2006, 09:27 PM
|- - jmknapp   QUOTE (Rob Pinnegar @ Jan 11 2006, 10:24 AM)T...   Jan 12 2006, 01:41 PM
|- - JRehling   QUOTE (jmknapp @ Jan 12 2006, 05:41 AM)Rather...   Jan 12 2006, 03:02 PM
- - alan   QUOTE Forgive me, but I'm having a little trou...   Jan 12 2006, 05:05 AM
|- - Tom Tamlyn   QUOTE (alan @ Jan 12 2006, 12:05 AM)CR = Cass...   Jan 13 2006, 03:37 AM
- - tasp   In regards to Hyperion, given the chaotic rotation...   Jan 12 2006, 03:34 PM
|- - JRehling   QUOTE (tasp @ Jan 12 2006, 07:34 AM)In regard...   Jan 12 2006, 06:08 PM
- - BruceMoomaw   QUOTE (JRehling @ Jan 12 2006, 06:08 PM)Chaot...   Jan 13 2006, 12:37 PM
- - Phil Stooke   The supposed chaotic rotation of Hyperion was only...   Jan 13 2006, 01:09 PM
- - Rob Pinnegar   A couple of points: (1) Has anyone given much con...   Jan 13 2006, 04:00 PM
|- - ugordan   QUOTE (Rob Pinnegar @ Jan 13 2006, 05:00 PM)F...   Jan 14 2006, 11:00 PM
|- - JRehling   QUOTE (Rob Pinnegar @ Jan 13 2006, 08:00 AM)A...   Jan 16 2006, 06:50 PM
|- - TritonAntares   Here some info about the transmission times - name...   Jan 20 2006, 12:32 AM
|- - Rob Pinnegar   QUOTE (JRehling @ Jan 16 2006, 12:50 PM)I can...   Jan 20 2006, 11:47 PM
|- - tasp   QUOTE (Rob Pinnegar @ Jan 20 2006, 05:47 PM)B...   Jan 21 2006, 06:53 AM
|- - Rob Pinnegar   QUOTE (tasp @ Jan 21 2006, 12:53 AM)Possibly ...   Jan 21 2006, 04:34 PM
- - hubdel11   Let's go ! http://saturn.jpl.nasa.gov/mult...   Jan 21 2006, 06:40 PM
- - Decepticon   Looks like something whizzed by the camera on this...   Jan 21 2006, 07:27 PM
|- - ugordan   QUOTE (Decepticon @ Jan 21 2006, 08:27 PM)Loo...   Jan 21 2006, 07:33 PM
|- - TritonAntares   Two new Iapetus images released. Here is one: ...   Jan 23 2006, 10:46 PM
|- - TritonAntares   Another series of 49 Iapetus images has been relea...   Jan 24 2006, 11:11 PM
|- - ugordan   Check out this Jan 24 image from 954 000 km. What ...   Jan 25 2006, 07:04 PM
|- - TritonAntares   QUOTE (ugordan @ Jan 25 2006, 09:04 PM)Check ...   Jan 25 2006, 07:50 PM
|- - TritonAntares   13 new Iapetus images released; one takeout: Date...   Jan 26 2006, 08:12 PM
|- - jmknapp   QUOTE (TritonAntares @ Jan 26 2006, 04:12 PM)...   Jan 27 2006, 03:26 PM
|- - TritonAntares   QUOTE (jmknapp @ Jan 27 2006, 05:26 PM)In pol...   Jan 27 2006, 05:06 PM
|- - nprev   QUOTE (TritonAntares @ Jan 27 2006, 10:06 AM)...   Jan 28 2006, 06:31 AM
||- - tasp   QUOTE (nprev @ Jan 28 2006, 12:31 AM)Iapetus ...   Jan 29 2006, 03:34 AM
||- - TritonAntares   QUOTE (nprev @ Jan 28 2006, 08:31 AM)Is that ...   Jan 29 2006, 10:24 PM
||- - nprev   QUOTE (TritonAntares @ Jan 29 2006, 03:24 PM)...   Jan 29 2006, 10:50 PM
||- - TritonAntares   QUOTE (nprev @ Jan 30 2006, 12:50 AM)Whups...   Jan 30 2006, 12:46 AM
||- - TritonAntares   Another 13 Iapetus cresents released... Two takeo...   Jan 30 2006, 08:57 AM
||- - Rob Pinnegar   QUOTE (TritonAntares @ Jan 29 2006, 06:46 PM)...   Jan 30 2006, 03:17 PM
||- - TritonAntares   QUOTE (Rob Pinnegar @ Jan 30 2006, 05:17 PM)T...   Jan 30 2006, 03:41 PM
|- - jmknapp   QUOTE (TritonAntares @ Jan 27 2006, 01:06 PM)...   Jan 28 2006, 11:52 AM
|- - TritonAntares   Another 13 new Iapetus images released... Two ta...   Jan 29 2006, 05:30 PM
||- - Rob Pinnegar   QUOTE (TritonAntares @ Jan 29 2006, 11:30 AM)...   Jan 29 2006, 05:49 PM
|- - TritonAntares   QUOTE (jmknapp @ Jan 28 2006, 01:52 PM)... I...   Feb 2 2006, 08:17 PM
||- - TritonAntares   Greuti - a member of a german forum - kindly simul...   Feb 3 2006, 11:40 AM
||- - Tman   QUOTE (TritonAntares @ Feb 3 2006, 12:40 PM)G...   Feb 3 2006, 08:25 PM
|- - TritonAntares   QUOTE (jmknapp @ Jan 28 2006, 12:52 PM) ....   Mar 7 2006, 02:23 AM
- - Decepticon   Can that area be associated with the Basin imaged ...   Jan 26 2006, 11:42 PM
|- - Rob Pinnegar   QUOTE (Decepticon @ Jan 26 2006, 05:42 PM)Can...   Jan 27 2006, 12:24 AM
|- - TritonAntares   QUOTE (Decepticon @ Jan 27 2006, 01:42 AM)Can...   Jan 27 2006, 01:02 AM
- - Decepticon   Hogland is gonna have a Hay Day with this. Last w...   Jan 28 2006, 05:04 AM
|- - nprev   QUOTE (Decepticon @ Jan 27 2006, 10:04 PM)Hog...   Jan 28 2006, 06:27 AM
- - Toma B   Here are images from latest non-targeted Iapetus f...   Jan 28 2006, 08:12 AM
- - Decepticon   Cool! I was waiting to see something like that...   Jan 28 2006, 08:18 AM
- - scalbers   Thanks to Toma in post #65 for that great montage....   Jan 28 2006, 09:17 PM
- - nprev   Tasp, you're too kind..thanks! Well, if...   Jan 29 2006, 06:09 AM
- - Rob Pinnegar   One more thing... Take a look at the image of Ia...   Jan 29 2006, 06:21 PM
|- - TritonAntares   QUOTE (Rob Pinnegar @ Jan 29 2006, 08:21 PM)T...   Jan 29 2006, 10:09 PM
- - Phil Stooke   Steve Albers suggested a long time ago that I post...   Jan 30 2006, 01:52 PM
- - Toma B   Here is final version of image covering Iapetus no...   Jan 30 2006, 11:22 PM
|- - tasp   QUOTE (Toma B @ Jan 30 2006, 05:22 PM)Here is...   Jan 31 2006, 12:46 AM
|- - tasp   QUOTE (Toma B @ Jan 30 2006, 05:22 PM)Here is...   Jan 31 2006, 02:32 AM
|- - Rob Pinnegar   QUOTE (tasp @ Jan 30 2006, 08:32 PM)Is it pos...   Jan 31 2006, 03:53 PM
- - scalbers   Here's an Iapetus map update, including the 95...   Feb 1 2006, 12:11 AM
- - Decepticon   I got my fingers crossed for some saturnshine imag...   Mar 7 2006, 03:31 AM

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