IPB

Welcome Guest ( Log In | Register )

6 Pages V  < 1 2 3 4 5 > »   
Reply to this topicStart new topic
More Moons Around Pluto?
tedstryk
post Nov 3 2005, 07:09 PM
Post #31


Interplanetary Dumpster Diver
****

Group: Admin
Posts: 4404
Joined: 17-February 04
From: Powell, TN
Member No.: 33



QUOTE (tasp @ Nov 3 2005, 04:11 PM)
Like in the Jupiter system, due to the resonance of Io, Europa, and Ganymede, certain configurations of the satellites never occur.  Like all three in a straight line on the same side of Jupiter. I was annoyed a little when the mission designers of Voyager II's Uranus flyby stated a particularly appealing configuration of the Uranian moons occured just a few days prior to the earliest possible flyby date that preserved the Neptune option.  Hence the fuzzy picture of Umbriel.

Should be easier for the analysts to examine ~77 days of moon configurations than potentially years worth.
*


Umbriel is an interesting world. But it wasn't worth the loss of Triton and Neptune. Also, no configuration of Uranus's moons in 1986 would be that good. Voyager was approaching like a dart headed straight at a dartboard, so rather than having closest approaches one by one, they were all at once. Also, had they been free of Neptune's constraints, Titania, not Miranda, would have received the close flyby - so they really lucked out!
Here are the best views we got of Umbriel.
Color:


Black and White:



Composite of Wunda (The bright feature at the top):



--------------------
Go to the top of the page
 
+Quote Post
Phil Stooke
post Nov 3 2005, 09:26 PM
Post #32


Solar System Cartographer
****

Group: Members
Posts: 10127
Joined: 5-April 05
From: Canada
Member No.: 227



Ted's pics of Umbriel are, as ever, excellent. I processed the same images as well, using different methods for mainly cartographic purposes. These are the results:

Attached Image


Attached Image


Phil


--------------------
... because the Solar System ain't gonna map itself.

Also to be found posting similar content on https://mastodon.social/@PhilStooke
NOTE: everything created by me which I post on UMSF is considered to be in the public domain (NOT CC, public domain)
Go to the top of the page
 
+Quote Post
Phil Stooke
post Nov 3 2005, 09:30 PM
Post #33


Solar System Cartographer
****

Group: Members
Posts: 10127
Joined: 5-April 05
From: Canada
Member No.: 227



...and here's a mosaic of the entire visible hemisphere in azimuthal equidistant projection.

Phil

Attached Image


Blast! I was just replying to Ted, I didn't notice what thread I was in. This should really be in the historic images thread... oops.


--------------------
... because the Solar System ain't gonna map itself.

Also to be found posting similar content on https://mastodon.social/@PhilStooke
NOTE: everything created by me which I post on UMSF is considered to be in the public domain (NOT CC, public domain)
Go to the top of the page
 
+Quote Post
JRehling
post Nov 3 2005, 09:43 PM
Post #34


Senior Member
****

Group: Members
Posts: 2530
Joined: 20-April 05
Member No.: 321



QUOTE (tasp @ Nov 3 2005, 09:11 AM)
Like in the Jupiter system, due to the resonance of Io, Europa, and Ganymede, certain configurations of the satellites never occur.  Like all three in a straight line on the same side of Jupiter.

Should be easier for the analysts to examine ~77 days of moon configurations than potentially years worth.
*


Good point. A 1:4:6 resonance actually allows 12 configurations (not 4 * 6 = 24) if we assume that the Charon position were fixed (which I suppose it is, barring an exceptional reason for change). When the outermost moon has made 2 laps around Pluto (or the barycenter), the middle moon will have made 3 -- that defines a cycle in twelve Charon revolutions, equaling, yes, 77 days).
Go to the top of the page
 
+Quote Post
tasp
post Nov 3 2005, 10:34 PM
Post #35


Member
***

Group: Members
Posts: 903
Joined: 30-January 05
Member No.: 162



I very much appreciate the Umbriel pictures. Maybe we get the NH2 to update the Voyager portfolio. And maybe we don't. Sigh.

Rectified Wunda picture is new to me, interesting feature. Still not evident what happened there, though.
Go to the top of the page
 
+Quote Post
tedstryk
post Nov 3 2005, 10:45 PM
Post #36


Interplanetary Dumpster Diver
****

Group: Admin
Posts: 4404
Joined: 17-February 04
From: Powell, TN
Member No.: 33



QUOTE (tasp @ Nov 3 2005, 10:34 PM)
I very much appreciate the Umbriel pictures.  Maybe we get the NH2 to update the Voyager portfolio.  And maybe we don't.  Sigh.

Rectified Wunda picture is new to me, interesting feature.  Still not evident what happened there, though.
*



It is almost certainly a bright crater rim...the question is WHY it is bright. There is also a bright central peak visible in another crater. I made the image by reprojecting the dataset used to make both images I posted to be from the same angle and at the same scale, and then stacked them. I used a color overlay from the posted image.

Here is a sequence of the best views of Umbriel. I am not at home right now, so I don't have a larger version. However, other than the images I already posted, the images aren't shrunken, so it will serve our purposes!



Phil: I also experimented with processing along the lines you did to bring out topography. The posted view focuses on a natural look. When I am home, I may try processing the same images in a similar way, and then merging the datasets to make a sharper image that brings out topography more.


--------------------
Go to the top of the page
 
+Quote Post
Phil Stooke
post Nov 3 2005, 11:15 PM
Post #37


Solar System Cartographer
****

Group: Members
Posts: 10127
Joined: 5-April 05
From: Canada
Member No.: 227



Ted, my interests are really in the area of making the most easily interpreted map images, not so much the natural view we would see if we were there. So my stuff can look a bit odd! I'm starting to think about doing more of this stuff...

Phil


--------------------
... because the Solar System ain't gonna map itself.

Also to be found posting similar content on https://mastodon.social/@PhilStooke
NOTE: everything created by me which I post on UMSF is considered to be in the public domain (NOT CC, public domain)
Go to the top of the page
 
+Quote Post
mchan
post Nov 4 2005, 03:25 AM
Post #38


Member
***

Group: Members
Posts: 599
Joined: 26-August 05
Member No.: 476



QUOTE (tasp @ Nov 3 2005, 03:34 PM)
I very much appreciate the Umbriel pictures.  Maybe we get the NH2 to update the Voyager portfolio.  And maybe we don't.  Sigh.

Rectified Wunda picture is new to me, interesting feature.  Still not evident what happened there, though.
*


NH2 did not get funding.
Go to the top of the page
 
+Quote Post
tedstryk
post Nov 4 2005, 03:49 AM
Post #39


Interplanetary Dumpster Diver
****

Group: Admin
Posts: 4404
Joined: 17-February 04
From: Powell, TN
Member No.: 33



QUOTE (Phil Stooke @ Nov 3 2005, 11:15 PM)
Ted, my interests are really in the area of making the most easily interpreted map images, not so much the natural view we would see if we were there.  So my stuff can look a bit odd!  I'm starting to think about doing more of this stuff...

Phil
*



Here is the result of my attempt to merge the two types of processing.



--------------------
Go to the top of the page
 
+Quote Post
tasp
post Nov 4 2005, 04:28 AM
Post #40


Member
***

Group: Members
Posts: 903
Joined: 30-January 05
Member No.: 162



More good pictures of mysterious Umbriel.

Does anyone have any idea where the pole is?

Or the equator?

When I look at the upper limb, from about 11 o'clock to Wunda, I see a 'ridgy' looking feature. Artifact of processing near the limb, or something more....interesting?

(enlarge picture to see it)

blink.gif
Go to the top of the page
 
+Quote Post
dvandorn
post Nov 4 2005, 08:26 AM
Post #41


Senior Member
****

Group: Members
Posts: 3419
Joined: 9-February 04
From: Minneapolis, MN, USA
Member No.: 15



The "ridgy" feature becomes clear when you look at Phil's cartographic-purposed image. There is a large, very degraded crater (or, rather, a basin) located right in that area. The ridge-like structure (visible more as an albedo difference farther into Umbriel's disk) is a basin ring.

-the other Doug


--------------------
“The trouble ain't that there is too many fools, but that the lightning ain't distributed right.” -Mark Twain
Go to the top of the page
 
+Quote Post
tasp
post Nov 4 2005, 02:37 PM
Post #42


Member
***

Group: Members
Posts: 903
Joined: 30-January 05
Member No.: 162



QUOTE (dvandorn @ Nov 4 2005, 08:26 AM)
The "ridgy" feature becomes clear when you look at Phil's cartographic-purposed image.  There is a large, very degraded crater (or, rather, a basin) located right in that area.  The ridge-like structure (visible more as an albedo difference farther into Umbriel's disk) is a basin ring.

-the other Doug
*



Thanx, I do see that now. I thought it odd something like that would be unnoticed in this time frame.
Go to the top of the page
 
+Quote Post
Phil Stooke
post Nov 4 2005, 03:04 PM
Post #43


Solar System Cartographer
****

Group: Members
Posts: 10127
Joined: 5-April 05
From: Canada
Member No.: 227



I'm posting more images in the historic images thread...

Phil


--------------------
... because the Solar System ain't gonna map itself.

Also to be found posting similar content on https://mastodon.social/@PhilStooke
NOTE: everything created by me which I post on UMSF is considered to be in the public domain (NOT CC, public domain)
Go to the top of the page
 
+Quote Post
Rob Pinnegar
post Nov 4 2005, 04:05 PM
Post #44


Member
***

Group: Members
Posts: 509
Joined: 2-July 05
From: Calgary, Alberta
Member No.: 426



QUOTE (Phil Stooke @ Nov 4 2005, 09:04 AM)
I'm posting more imagfes in the historic images thread...

Good idea Phil. We have got a bit off the Pluto topic here.
Go to the top of the page
 
+Quote Post
tty
post Nov 4 2005, 06:59 PM
Post #45


Member
***

Group: Members
Posts: 688
Joined: 20-April 05
From: Sweden
Member No.: 273



QUOTE (tasp @ Nov 3 2005, 06:11 PM)
Like in the Jupiter system, due to the resonance of Io, Europa, and Ganymede, certain configurations of the satellites never occur.  Like all three in a straight line on the same side of Jupiter.


Hmm... I didn't know that and so apparently didn't Robert Heinlein. The big quake in "Farmer in the sky" happened when all 4 galileans lined up.

tty
Go to the top of the page
 
+Quote Post

6 Pages V  < 1 2 3 4 5 > » 
Reply to this topicStart new topic

 



RSS Lo-Fi Version Time is now: 28th March 2024 - 08:09 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 funded by the Planetary Society. Please consider supporting our work and many other projects by donating to the Society or becoming a member.