Before the T9 data came down, I got a little bored, and played around with some Voyager data of Ariel. The mosaic (oft produced) I generated is below. Again, this mosaic has been produced by a number of folks on the net, so this isn't really new, but I thought I would get this product out there anyway. I stretched the image such that only a few crater rims would have a DN=255 (other mosaics boost the contrast a bit too much, overexposing the ejecta around Melusine, for example. I also ran this image through a high pass filter, sharpening the image.
Enjoy!
Very nice, Jason! I like the extra detail that you get by high pass filtering and not over-stretching it.
A general comment/question about the Uranian satellite images...because of the season, all of the illuminated parts of all of the satellites in all of the images were pretty much in the southern hemisphere, right? Yet it's really rare to see the Uranian satellite images oriented so that the south pole is at the bottom of the images. I usually rotate any such views before I post them to make them hemispheres illuminated from the bottom, assuming that that puts north at the top. Is that right?
--Emily
You're right, South is approximately to the left.
Here's another one from shortly before Jason's. This is a composite of all the frames from the sequence, chosen to give the maximum surface coverage (hence a small extension at the top from a lower quality frame, not usually included in previous versions of this mosaic).
Phil
... and the one before that. This is a 'super-resolution' composite of several frames from a color sequence.
Phil
Why don't you re-post some of your Umbriel shots here, Phil? This would be a good place to put them.
Great mosaic work!
I did some work with Ariel images a while back, including this approach sequence, using super-resolution where appropriate data was available.
http://img407.imageshack.us/my.php?image=arielsequence4us.jpg
Here are two of the images in color:
http://img254.imageshack.us/my.php?image=arielc6hg.jpg
Here is the night side from the same images as Jason's mosaic.
http://img254.imageshack.us/my.php?image=nightgreat7yt2zk.jpg
Here is my best effort with Umbriel.
http://img272.imageshack.us/my.php?image=umbrielsupresgoodbestcolor4rz5.jpg
http://pages.preferred.com/%7Etedstryk/umbriel.html
Also, here are similarly processed images of Oberon.
http://img254.imageshack.us/my.php?image=oberonsuprescolors1nq0iz.jpg
http://img269.imageshack.us/my.php?image=oberonset9ku8ii.jpg
Here is a new version I produced of the Ariel closest mosaics.
http://img15.imageshack.us/my.php?image=arielnew16kt.jpg
Very nice ted. I like the approach sequence, as it clearly shows the rotation of Ariel.
That is neat to see. I really like my last on though, because it shows the night side more clearly. Here is a slightly improved version (I reduced a frame border line).
http://img380.imageshack.us/my.php?image=arielnew1a4ep.jpg
Here is a color view of the night side. Of course, the night side is colorized, since there is no color data available, as are some areas near the terminator.
http://img16.imageshack.us/my.php?image=arielnew1ac2dm.jpg
Very, very nice, Ted!
The stuff you manage to pull out of the old Voyager imagery more resembles Cassini-quality pics than poor-old-vidicon-tube Voyagers!
Ted's stuff is great - keep it up! I hope you recover from your recent crash OK.
Not to ignore Rob Pinnegar's request - Hi Rob! - but I've been too busy to deal with it. Teaching again this term. If somebody wants to find those posts and link back to them that would be fine. I'd rather not post a second time. But too busy to search for the old post.
Oops - gotta go!
Phil
Today, January 24, is the twentieth anniversary of Voyager 2's flyby of the planet Uranus, the first probe to that world.
http://voyager.jpl.nasa.gov/science/uranus.html
http://en.wikipedia.org/wiki/Voyager_2
Four days later, nearly everyone forgot about this mission and its images of a bland blue ball.
http://www.fas.org/spp/51L.html
I was digging through some boxes of memorabilia yesterday, and I came across my issue of Sky & Telescope magazine with Voyager 2's flyby of Saturn. Wow, that seems like ages ago! (and I had already been subscribing for 13 years by then)
It was 1989 that I really took up an interest, with Phobos-2 at Mars and then Voyager at Neptune. My students asked me today (I don't know how they found out it was my birthday) if it was hard revising papers back when I had to use a chisel.
That Sky & Tel cover does bring back memories...
I was 18 (legal age in MT in 1980), and I spent Nov 11th--or was it the 12th?-- of that year drinking beer with my high school physics teacher--ubernerd, yeah, I know-- at the Village Inn Pizza Parlor in Butte, MT & watching the Voyager 1 Saturn pics come in on their new-fangled big projection TV!!! (The local PBS affiliate carried the NASA feed).
Second ljk4-1...we need an old guy smiley!!!
1986, I was 4. I don't know when exactly my interest in planets began, but by 4th grade, I knew more about the planets than the teacher did. I could recite the orbital times of all the planets, and the diameters of some. Most of that information came courtesy of Isaac Asimov's Library of the Universe books, which were thin but informative books made shorlty after Voyager 2's flyby of Neptune. One per planet and one for the Sun.
Still remember seeing The Grand Tour video, and cringing that it would be awhile until the 1997 launch of Cassini...and then the 7 year trip too. Just seemed like forever.
I was born October 17, 1955. I was just short of two years old when Sputnik 1 was launched. I was five and a half when Gagarin orbited the Earth (and I actually remember the event). I was 8 years old when Mariner 4 flew by Mars, and I was three months short of 14 when Apollo 11 landed on the Moon and when Mariners 6 and 7 flew past Mars.
I was 23 when the Pioneers flew past Jupiter, and I was 34 when Voyager 2 and PBS gifted me with "Neptune All Night."
I'll be three months shy of 60 years old when New Horizons encounters the Pluto system.
Then again, I was 48 when MER-A and MER-B landed on Mars. I'm 50 now, and the MERs are still going strong. Sort of puts it in perspective.
-the other Doug
I know this is getting off-topic, but I had to reply...
I was about -1 then. I was born in February 1987.
So there.
Well it must be good news that so many of the active participants here are so young.
It's strange but when I see tecnical discussions I visualise old beardy blokes[guys].
Good for you kids!
Nick
(Child of the Apollo age)
Galileo orbit insertion? But that was just a few years ago... It could NO WAY be 10 years!
Interesting you say that, volcanopele...It was in fourth grade when I began taking interest. I remember I would always get astronomy books for Christmas, but unfortunately it was lost on my family and friends that there is a difference between an interest in the planets and deep sky objects and star charts (the latter two are interesting granted, but were never of great interest to me).
I remember my interest began when a Popeye cartoon showed him in space, and I asked my Mom which planet had rings (and she correctly answered Saturn). Reflecting an interest that was already in place, I received an astronomy book for Christmas when I was 5; I remember a year earlier when I was *3* just short of 4 looking up at the Moon while Apollo 17 was on the surface.
When I was in fourth grade, I was subscribed to Science magazine just for the space articles. At some point, I figured I must know more about astronomy than anyone my age, and if I just "maintained my lead", I would someday know more than anyone in the world. But I gave that up; volcanopele has taken that charge seriously.
This month, I finally used my vintage-1979 telescope to take passable space pictures...
Galileo orbital insertion also re-awakened my interest, but the main credit is due to Internet coverage of Galileo. In the 1970s, I would clip newspaper stories, and buy a new book every three years to download "the latest" information. Internet coverage of Galileo was like drinking from a firehose.
Yes, the internet is amazing. These days I can hardly find the time to do any real work at all.
Apollo 8 got me very seriously interested - but building on a kid-style interest from about 1965 on. Bliss was it in that dawn to be alive, But to be young was very Heaven! (to quote the old sheep of the Lake District). But I also started by building scrapbooks of news cuttings etc., until now I can barely move for the piles of junk which surround me. I have to take students to another room when I need to talk to them.
Phil
Here is a new version of some of the best Ariel images.
http://img127.imageshack.us/my.php?image=newarielcombo5ja.jpg
Here is a super-res of Titania. It is a very distant shot, but it is the best of the OGV images for this moon. The O, G, and V frames, in their original size but contrast stretched and a bit cleaned up, are below.
Here is a full Titania shot.
Reminds me a lot of Callisto, at least at comparable resolution.
-the other Doug
Looking at these picture just strengthens the need for more science from a orbiter.
Here is the Titania sequence. The color is based on the OGV set. The problem with the full phase sets is that although Titania is rotating, the images are boresighted on the south pole, so it is simply going around like a pinwheel.
http://img135.imageshack.us/my.php?image=titaniaapproach6lw.jpg
Also, here is a full view from a stacking of all five "pinwheel sets" with OGV color.
http://img110.imageshack.us/my.php?image=titaniagoodfull7qh.jpg
Here is a slightly better full image.
There's an interesting new paper in the January 2006 issue of Solar System Research:
Mutual occultations and eclipses of the major Uranian satellites in 2006–2010
N. V. Emels’yanov
Solar System Research 40, 79-83 (2006).
DOI: 10.1134/S0038094606010047
http://www.springerlink.com/(myxzrn55h2v5ra45k3kjwd45)/app/home/contribution.asp?referrer=parent&backto=issue,4,4;journal,1,32;linkingpublicationresults,1:106293,1
Here are the next series out. Maybe this will fill the hole.
http://img104.imageshack.us/my.php?image=arieldistantcombo5bp.jpg
Steve, I think the image in post 5 of this thread might be a little clearer than the one you used. And these two (almost the same as each other) fill in the gap.
I'm especially pleased to see the nightside detail added to your map - certainly a first in the history of planetary cartography (for Ariel, I mean).
Phil
It's very hard to get a good image out of the dark side views. Ted has done a great job. I tackled it as well, with this as one version of my efforts:
And here as Rob suggested a while ago is my Umbriel cylindrical mosaic.
Phil
Wow - images aplenty. Challenging to decide exactly what to try. I did add a link to Phil's Umbriel map from my website, hope that's OK. For the Ariel gap filling I tried the largest one in Ted's series from post #54. This filled some of the equatorial gap, now if I could just find one to fill the rest
http://laps.noaa.gov/albers/sos/sos.html#ARIEL
Thanks for including all the images Ted. I now see after taking a closer look that the third image from the right (post 54) fills in the rest of the gap. So I think we now have the entire equatorial region covered.
http://laps.noaa.gov/albers/sos/sos.html#ARIEL
Is there a similar set of images for Miranda?
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