IPB

Welcome Guest ( Log In | Register )

2 Pages V   1 2 >  
Reply to this topicStart new topic
Rev 132 - May 26-Jun 11, 2010 - Rhea
jasedm
post May 27 2010, 05:34 PM
Post #1


Member
***

Group: Members
Posts: 629
Joined: 22-January 06
Member No.: 655



Jason's looking ahead article now available over at ciclops for the next revolution. Great Titan flyby, a look at Rhea, and a far-out (100,000km +) view of Pandora. It will be great to see the other side of Pandora, as the moon seems to have been neglected somewhat (other competing targets of course...) since the flyby five years ago.

Thanks Jason, always appreciated that we're able to be party to upcoming goodies.
Go to the top of the page
 
+Quote Post
Phil Stooke
post Jun 4 2010, 06:33 PM
Post #2


Solar System Cartographer
****

Group: Members
Posts: 8142
Joined: 5-April 05
From: Canada
Member No.: 227



Here's Pandora... start and end of the sequence, three frames averaged, with little change in orientation but some change in illumination.

Phil
Attached Image


--------------------
... because the Solar System ain't gonna map itself.
Go to the top of the page
 
+Quote Post
elakdawalla
post Jun 4 2010, 06:36 PM
Post #3


Administrator
****

Group: Admin
Posts: 5170
Joined: 4-August 05
From: Pasadena, CA, USA, Earth
Member No.: 454



Damn, Phil, I just checked for the raws half an hour ago and they weren't up yet. Quick work! tongue.gif Got a few Rhea pics up there now too.


--------------------
My blog - @elakdawalla on Twitter - Please support unmannedspaceflight.com by donating here.
Go to the top of the page
 
+Quote Post
nprev
post Jun 4 2010, 09:37 PM
Post #4


Senior Member
****

Group: Admin
Posts: 8419
Joined: 8-December 05
From: Los Angeles
Member No.: 602



Beautiful, Phil.

Strange-looking thing; oddly looks like a model of itself with the bright (ice?) glints off the crater rims & the subdued topography from ring material deposition.


--------------------
A few will take this knowledge and use this power of a dream realized as a force for change, an impetus for further discovery to make less ancient dreams real.
Go to the top of the page
 
+Quote Post
JohnVV
post Jun 5 2010, 02:26 AM
Post #5


Member
***

Group: Members
Posts: 844
Joined: 18-November 08
Member No.: 4489



i swear that i cooked that thing with dinner
sliced and browned in a cast iron skillet
Go to the top of the page
 
+Quote Post
Juramike
post Jun 5 2010, 05:39 AM
Post #6


Senior Member
****

Group: Moderator
Posts: 2783
Joined: 10-November 06
From: Pasadena, CA
Member No.: 1345



6-frame mosaic of Rhea (go on! I dare ya to find the seams!):

Attached Image


A big 4000 x 4000 pixel original size image in all it's icy cratery goodness can be viewed here: http://www.flickr.com/photos/31678681@N07/4670487271/


But there's something kinda strange in this image....


--------------------
Some higher resolution images available at my photostream: http://www.flickr.com/photos/31678681@N07/
Go to the top of the page
 
+Quote Post
Juramike
post Jun 5 2010, 05:45 AM
Post #7


Senior Member
****

Group: Moderator
Posts: 2783
Joined: 10-November 06
From: Pasadena, CA
Member No.: 1345



Anybody know what this is? This is an unaltered crop from image N00154971 (I even left the dropouts in).

Attached Image


The strange linear feature in the center of the image angles across the JPEG artifacts. Shading comparison with craters would indicate it is a straight trench if it is a surface feature.


--------------------
Some higher resolution images available at my photostream: http://www.flickr.com/photos/31678681@N07/
Go to the top of the page
 
+Quote Post
ElkGroveDan
post Jun 5 2010, 06:00 AM
Post #8


Senior Member
****

Group: Admin
Posts: 4750
Joined: 15-March 05
From: Sloughhouse, CA
Member No.: 197



I'm going to go out on a limb and suggest that something passed between Cassini and Rhea as the picture was being taken.

Here's the full image deinterlaced.
Attached thumbnail(s)
Attached Image
 


--------------------
If Occam had heard my theory, things would be very different now.
Go to the top of the page
 
+Quote Post
JohnVV
post Jun 5 2010, 06:02 AM
Post #9


Member
***

Group: Members
Posts: 844
Joined: 18-November 08
Member No.: 4489



this shows it all - a chain
[attachment=21841:Screenshot.png]
cleaned up and most jpg artifacts removed
[attachment=21842:N00154971.png]

i have been seeing these things all over the place
come to think of it isn't there a thread on that someplace ?
Go to the top of the page
 
+Quote Post
Juramike
post Jun 5 2010, 06:18 AM
Post #10


Senior Member
****

Group: Moderator
Posts: 2783
Joined: 10-November 06
From: Pasadena, CA
Member No.: 1345



It's a real surface feature!

Using Celestia, and Tirawa Crater as a reference, I reckon this feature is at [-37S, 173W] in this image.

A peek at Planetary Photojournal image PIA12561 (Map of Rhea - February 2010) and you can clearly see it at the same location [-35S, 170W] in lower left near the edge of the map]. Shading also appears to make this feature as a trench also.


--------------------
Some higher resolution images available at my photostream: http://www.flickr.com/photos/31678681@N07/
Go to the top of the page
 
+Quote Post
nomisn
post Jun 5 2010, 11:23 AM
Post #11


Newbie
*

Group: Members
Posts: 6
Joined: 8-July 09
From: Glen Waverley, Melbourne, Australia
Member No.: 4858



Great view of Daphinis and another moon creating waves in the latest batch of images on the Cassini raw images page

ttp://saturn.jpl.nasa.gov/multimedia/images/raw/casJPGFullS60/N00154943.jpg

Part of a sequence of images of the rings starting here

http://saturn.jpl.nasa.gov/photos/raw/inde...storedQ=2239945

Cheers
Go to the top of the page
 
+Quote Post
Floyd
post Jun 5 2010, 12:16 PM
Post #12


Member
***

Group: Members
Posts: 836
Joined: 4-September 06
From: Boston
Member No.: 1102



ohmy.gif Wow, those are among some of the best shots of Daphinis and its bending waves ever taken. Surprised the viewing is so good several months past equinox. Pan is the other moon and the view of its induced waves is also amazing.

link to image [nomisn's first link is missing an "h" at the start]

If I am interpreting this correctly, we are not seeing shadows projected on the rings, like at equinox, but rather different light reflecting off crests and valleys of induced waves in the ring plane.


--------------------
Go to the top of the page
 
+Quote Post
nomisn
post Jun 5 2010, 12:43 PM
Post #13


Newbie
*

Group: Members
Posts: 6
Joined: 8-July 09
From: Glen Waverley, Melbourne, Australia
Member No.: 4858



Sorry. Thanks Floyd for the correct link. Wow indeed. I agree. One of the best Daphinis wave images so far.
Go to the top of the page
 
+Quote Post
Bill Harris
post Jun 5 2010, 01:35 PM
Post #14


Senior Member
****

Group: Members
Posts: 2621
Joined: 30-October 04
Member No.: 105



QUOTE
It's a real surface feature! (The strange linear feature)
I've puzzled over that before. Straight and uniform with respect to topography, it almost looks "artificial". I concluded that, with all of the crater chains, ejecta scars and tectonic featuress we've seen on the Icy Moons this one just happens to be straight and uniform.

QUOTE
Wow, those are among some of the best shots of Daphinis and its bending waves
And another amazing image in this batch. In a couple of years (or more?) of looking at Daphnis' bending waves, I don't ever recall seeing them this pronounced and extreme. I wonder if anything has changed at Daphnis to create this difference? Again, it may be one of these statistical fluctuations...

--Bill


--------------------
Go to the top of the page
 
+Quote Post
ElkGroveDan
post Jun 5 2010, 02:00 PM
Post #15


Senior Member
****

Group: Admin
Posts: 4750
Joined: 15-March 05
From: Sloughhouse, CA
Member No.: 197



QUOTE (Juramike @ Jun 4 2010, 10:18 PM) *
It's a real surface feature! A peek at Planetary Photojournal image PIA12561 (Map of Rhea - February 2010) and you can clearly see it at the same location [-35S, 170W] in lower left near the edge of the map]. Shading also appears to make this feature as a trench also.


I agree but would call it a fracture. No way it's a chain though.


--------------------
If Occam had heard my theory, things would be very different now.
Go to the top of the page
 
+Quote Post

2 Pages V   1 2 >
Reply to this topicStart new topic

 



RSS Lo-Fi Version Time is now: 28th March 2020 - 09:33 PM
RULES AND GUIDELINES
Please read the Forum Rules and Guidelines before posting.

IMAGE COPYRIGHT
Images posted on UnmannedSpaceflight.com may be copyrighted. Do not reproduce without permission. Read here for further information on space images and copyright.

OPINIONS AND MODERATION
Opinions expressed on UnmannedSpaceflight.com are those of the individual posters and do not necessarily reflect the opinions of UnmannedSpaceflight.com or The Planetary Society. The all-volunteer UnmannedSpaceflight.com moderation team is wholly independent of The Planetary Society. The Planetary Society has no influence over decisions made by the UnmannedSpaceflight.com moderators.
SUPPORT THE FORUM
Unmannedspaceflight.com is a project of the Planetary Society and is funded by donations from visitors and members. Help keep this forum up and running by contributing here.