Enceladus, Cassini Spacecraft, Rev 80 Encounter.

3488 · Aug 10, 2008

Monday 11th August 2008.Cassini Spacecraft very close brush past of Enceladus. Promises to be fascinating. 7 metre resolution of the Cairo Sulcus Tiger Stripe. Hopefully the CDA performs well this time.Cassini passes 50 KM over the equator, then proceeds south to pass through the actual south polar plumes. Andrew Brown.  <div class="Discussion_UserSignature"> "I suddenly noticed an anomaly to the left of Io, just off the rim of that world. It was extremely large with respect to the overall size of Io and crescent shaped. It seemed unbelievable that something that big had not been visible before". Linda Morabito on discovering that the Jupiter moon Io was volcanically active. Friday 9th March 1979.http://www.launchphotography.com/ http://anthmartian.googlepages.com/thisislandearthhttp://web.me.com/meridianijournal </div>

l3p3r · Aug 10, 2008

Replying to: <DIV CLASS='Discussion_PostQuote'>Monday 11th August 2008.Cassini Spacecraft very close brush past of Enceladus. Promises to be fascinating. 7 metre resolution of the Cairo Sulcus Tiger Stripe. Hopefully the CDA performs well this time.Cassini passes 50 KM over the equator, then proceeds south to pass through the actual south polar plumes. Andrew Brown.  Posted by 3488</DIV>It feels like we've been waiting an eternity for more enceladus images! I can't wait

Testing · Aug 10, 2008

Replying to: <DIV CLASS='Discussion_PostQuote'>Monday 11th August 2008.Cassini Spacecraft very close brush past of Enceladus. Promises to be fascinating. 7 metre resolution of the Cairo Sulcus Tiger Stripe. Hopefully the CDA performs well this time.Cassini passes 50 KM over the equator, then proceeds south to pass through the actual south polar plumes. Andrew Brown.  Posted by 3488</DIV> Some insight.http://blogs.nasa.gov/cm/blog/cassini-aug08/posts/post_1218130703424.html <div class="Discussion_UserSignature"> </div>

3488 · Aug 10, 2008

Replying to: <DIV CLASS='Discussion_PostQuote'>Some insight.http://blogs.nasa.gov/cm/blog/cassini-aug08/posts/post_1218130703424.html Posted by Testing</DIV>Thanks Testing,I like the encounter animation, shows very well, which intruments are doing what & when. Also looks like we get to see much of it on Tuesday morning our time here in the UK, so a very short wait for the images at least.Wonder what 7 metres resolution will show? Banks of ice building up on either side of Cairo Sulcus? Faulting? Wow I cannot wait.Andrew Brown.  <div class="Discussion_UserSignature"> "I suddenly noticed an anomaly to the left of Io, just off the rim of that world. It was extremely large with respect to the overall size of Io and crescent shaped. It seemed unbelievable that something that big had not been visible before". Linda Morabito on discovering that the Jupiter moon Io was volcanically active. Friday 9th March 1979.http://www.launchphotography.com/ http://anthmartian.googlepages.com/thisislandearthhttp://web.me.com/meridianijournal </div>

Testing · Aug 10, 2008

I tend to follow programs I have had a hand in. In this case filter wheels of the Wide and Narrow angle imaging system.http://blogs.nasa.gov/cm/blog/cassini-aug08/posts/post_1218233481760.htmlhttp://blogs.nasa.gov/cm/blog/cassini-aug08/posts/post_1218232243454.html <div class="Discussion_UserSignature"> </div>

neuvik · Aug 10, 2008

What events are they looking for with the Cassini Plasma Spectrometer that would signify that Enceladus would be interacting with Saturns Magnetosphere?  The atmosphere is much too thin for any aurora events I should think.   Thanks! <div class="Discussion_UserSignature"> I don't think I'm alone when I say, "I hope more planets fall under the ruthless domination of Earth!"SDC Boards: Power by PLuck - Ph**king Luck </div>

3488 · Aug 10, 2008

Replying to: <DIV CLASS='Discussion_PostQuote'>I tend to follow programs I have had a hand in. In this case filter wheels of the Wide and Narrow angle imaging system.http://blogs.nasa.gov/cm/blog/cassini-aug08/posts/post_1218233481760.htmlhttp://blogs.nasa.gov/cm/blog/cassini-aug08/posts/post_1218232243454.html Posted by Testing</DIV>WOW, that is amazing, getting to talk with someone who was actively involved with the Imaging Science Subsystems. Your instruments have never failed, not once, you must be proud of the results plus the extended mission. AFAIK DrRocket was involved with the Titan 4 launch vehicle & I have been involved with sharing ideas with the Cassini Mission team (in an unprofessional capacity as an outsider). Replying to: <DIV CLASS='Discussion_PostQuote'>What events are they looking for with the Cassini Plasma Spectrometer that would signify that Enceladus would be interacting with Saturns Magnetosphere?  The atmosphere is much too thin for any aurora events I should think.   Thanks! Posted by neuvik</DIV>That's my take on it also neuvik. There may be some very weak UV aurorae, but I suspect the interest is in the disocciation of any H20 & other molecules & the motions / enrgies of the atoms once they interact with Saturn's magnetosphere.Andrew Brown.  <div class="Discussion_UserSignature"> "I suddenly noticed an anomaly to the left of Io, just off the rim of that world. It was extremely large with respect to the overall size of Io and crescent shaped. It seemed unbelievable that something that big had not been visible before". Linda Morabito on discovering that the Jupiter moon Io was volcanically active. Friday 9th March 1979.http://www.launchphotography.com/ http://anthmartian.googlepages.com/thisislandearthhttp://web.me.com/meridianijournal </div>

Testing · Aug 10, 2008

Easy Andrew you mis-understand. A filter wheel is one component of a very complex instrument. It is no more than an optical element that gets rotated into the optical path with six choices. That is the only part I had in the system. But I am very proud of everything that I have touched that is no longer on this planet. <div class="Discussion_UserSignature"> </div>

3488 · Aug 11, 2008

Allow me to post one of the first approach images during tonight's Enceladus close brush pass encounter.Here we are more or less looking straight down on top of Enceladus, the less evolved cratered terrain, though it is worth noting, that even here is not as heavily cratered as Tethys or Rhea.Also the craters have a softer profile, much like many of those on Dione & the Uranus moons Ariel, Titania & Oberon, other moons that we know have seen activity in the relatively recent geological past & quite possibly still are in a small way.Clues that even the cratered surfaces have warmed & softened, before refreezing.In the image below, the 40 KM wide craters Ali Baba & Aladdin are already visible this afternoon (roughly mid way between the limb & the terminator at the three O' clock position). Northern Hemisphere from 447,000 KM during approach. <img src="http://sitelife.space.com/ver1.0/Content/images/store/1/0/c1d82dd3-2ef2-4807-b042-b3b1575dbf12.Medium.jpg" alt="" />Wide angle long exposure of Enceladus from 444,673 KM.Background showing the stars of southern Hydrus & Octans. <img src="http://sitelife.space.com/ver1.0/Content/images/store/8/15/c8483770-7450-4bfa-bf8b-9ec2bbc545a7.Medium.jpg" alt="" /> Andrew Brown.  <div class="Discussion_UserSignature"> "I suddenly noticed an anomaly to the left of Io, just off the rim of that world. It was extremely large with respect to the overall size of Io and crescent shaped. It seemed unbelievable that something that big had not been visible before". Linda Morabito on discovering that the Jupiter moon Io was volcanically active. Friday 9th March 1979.http://www.launchphotography.com/ http://anthmartian.googlepages.com/thisislandearthhttp://web.me.com/meridianijournal </div>

3488 · Aug 12, 2008

Cassini has begun to return Enceladus data.RAW Images will be here.No new pictures as yet, but I do not think it will be long now. Stayed tuned.Andrew Brown. <div class="Discussion_UserSignature"> "I suddenly noticed an anomaly to the left of Io, just off the rim of that world. It was extremely large with respect to the overall size of Io and crescent shaped. It seemed unbelievable that something that big had not been visible before". Linda Morabito on discovering that the Jupiter moon Io was volcanically active. Friday 9th March 1979.http://www.launchphotography.com/ http://anthmartian.googlepages.com/thisislandearthhttp://web.me.com/meridianijournal </div>

Philotas · Aug 12, 2008

Replying to: <DIV CLASS='Discussion_PostQuote'>Casinni has begun to return Enceladus data.RAW Images will be here.No new pictures as yet, but I do not think it will be long now. Stayed tuned.Andrew Brown. Posted by 3488</DIV> Aye, this appears to be the closest so far. <img src="http://sitelife.space.com/ver1.0/content/scripts/tinymce/plugins/emotions/images/smiley-laughing.gif" border="0" alt="Laughing" title="Laughing" /> <table border="0" cellspacing="0" cellpadding="0" align="center"><tbody><tr><td align="center" valign="top"><img src="http://saturn.jpl.nasa.gov/multimedia/images/raw/casJPGBrowseS43/W00048462.jpg" border="0" alt="W00048462.jpg" width="500" height="500" />

3488 · Aug 12, 2008

Replying to: <DIV CLASS='Discussion_PostQuote'>Aye, this appears to be the closest so far.   Full-Res: W00048462.jpg Posted by Philotas</DIV>Hi Philotas, Nothing as yet from the close encounter has shown up. Hope it's not long now.Andrew Brown. <div class="Discussion_UserSignature"> "I suddenly noticed an anomaly to the left of Io, just off the rim of that world. It was extremely large with respect to the overall size of Io and crescent shaped. It seemed unbelievable that something that big had not been visible before". Linda Morabito on discovering that the Jupiter moon Io was volcanically active. Friday 9th March 1979.http://www.launchphotography.com/ http://anthmartian.googlepages.com/thisislandearthhttp://web.me.com/meridianijournal </div>

aaron38 · Aug 12, 2008

Replying to: <DIV CLASS='Discussion_PostQuote'>Wonder what 7 metres resolution will show?Posted by 3488</DIV>Is 7 meter resolution equivalent to 7 meters per pixel?  If not, what is the pixel size?

robnissen · Aug 12, 2008

Replying to: <DIV CLASS='Discussion_PostQuote'>Is 7 meter resolution equivalent to 7 meters per pixel?  If not, what is the pixel size? Posted by aaron38</DIV> Yes, seven meters per pixel.

baulten · Aug 12, 2008

Wow!  7 meter resolution? That's amazing!  I can't wait.

Philotas · Aug 12, 2008

The first raw images appears to be coming in at the link that Andew provided.<table border="0" cellspacing="0" cellpadding="8" width="100%"><tbody><tr bgcolor="#0a4e89"><td class="rawImageSearchTextWhite">Displaying results 1 to 16 of 500

3488 · Aug 12, 2008

Replying to: <DIV CLASS='Discussion_PostQuote'>The first raw images appears to be coming in at the link that Andew provided.Displaying results 1 to 16 of 500 Posted by Philotas</DIV>Thank you Philotas, A few more here just in.I've been out all evening, just gotten back. Certainly looks like they're coming in now. I think these may be the Enceladus in eclipse images?Andrew Brown.  <table border="0" cellspacing="0" cellpadding="0" width="100%" align="center"><tbody><tr> <td width="15"><img src="http://saturn.jpl.nasa.gov/multimedia/images/images/blank-space.gif" border="0" alt="" hspace="0" width="15" height="1" />

3488 · Aug 12, 2008

Here we are TEN metres per pixel folks. Cassini was approx: 1,288 kilometers / 800 miles above the surface. <img src="http://sitelife.space.com/ver1.0/Content/images/store/12/3/ac2477ee-1442-451a-931b-88bdcd68f86c.Medium.jpg" alt="" />  Andrew Brown.  <div class="Discussion_UserSignature"> "I suddenly noticed an anomaly to the left of Io, just off the rim of that world. It was extremely large with respect to the overall size of Io and crescent shaped. It seemed unbelievable that something that big had not been visible before". Linda Morabito on discovering that the Jupiter moon Io was volcanically active. Friday 9th March 1979.http://www.launchphotography.com/ http://anthmartian.googlepages.com/thisislandearthhttp://web.me.com/meridianijournal </div>

3488 · Aug 12, 2008

Cairo Sulcus region @ Eighteen metres per pixel.Cassini was approx: 1,567 kilometers / 974 miles from Enceladus. <img src="http://sitelife.space.com/ver1.0/Content/images/store/9/7/f91f10af-a416-408f-879b-263d180d51a1.Medium.jpg" alt="" />  Andrew Brown.  <div class="Discussion_UserSignature"> "I suddenly noticed an anomaly to the left of Io, just off the rim of that world. It was extremely large with respect to the overall size of Io and crescent shaped. It seemed unbelievable that something that big had not been visible before". Linda Morabito on discovering that the Jupiter moon Io was volcanically active. Friday 9th March 1979.http://www.launchphotography.com/ http://anthmartian.googlepages.com/thisislandearthhttp://web.me.com/meridianijournal </div>

3488 · Aug 12, 2008

Cairo Sulcus region Twenty metres per pixel. <img src="http://sitelife.space.com/ver1.0/Content/images/store/10/7/ea1033c5-2263-49c8-a79d-7281a35978fa.Medium.jpg" alt="" />  Andrew Brown.  <div class="Discussion_UserSignature"> "I suddenly noticed an anomaly to the left of Io, just off the rim of that world. It was extremely large with respect to the overall size of Io and crescent shaped. It seemed unbelievable that something that big had not been visible before". Linda Morabito on discovering that the Jupiter moon Io was volcanically active. Friday 9th March 1979.http://www.launchphotography.com/ http://anthmartian.googlepages.com/thisislandearthhttp://web.me.com/meridianijournal </div>

3488 · Aug 12, 2008

Blow up & crop of bottom left portion of 10 metre per pixel image. <img src="http://sitelife.space.com/ver1.0/Content/images/store/5/10/451dce93-f4df-486c-9a65-6e9b33e3cec3.Medium.jpg" alt="" />  Andrew Brown.  <div class="Discussion_UserSignature"> "I suddenly noticed an anomaly to the left of Io, just off the rim of that world. It was extremely large with respect to the overall size of Io and crescent shaped. It seemed unbelievable that something that big had not been visible before". Linda Morabito on discovering that the Jupiter moon Io was volcanically active. Friday 9th March 1979.http://www.launchphotography.com/ http://anthmartian.googlepages.com/thisislandearthhttp://web.me.com/meridianijournal </div>

neuvik · Aug 12, 2008

Replying to: <DIV CLASS='Discussion_PostQuote'>Blow up & crop of bottom left portion of 10 metre per pixel image.  Andrew Brown.  Posted by 3488</DIV> Andrew the photos in your last three posts, those are of the tiger stripes, or sulci right?  I hope we see some eruptions, thanks for the links!  <div class="Discussion_UserSignature"> I don't think I'm alone when I say, "I hope more planets fall under the ruthless domination of Earth!"SDC Boards: Power by PLuck - Ph**king Luck </div>

bobw · Aug 12, 2008

There is a picture here http://ciclops.org/view.php?id=5156&js=1 about halfway down the page that shows the context image for the close-ups.  They are just tiny portions of the tiger stripes, but yes Sulcus (Sulci ?) are the stripes.  I have been looking forward to searching for hot spots in Damascus Sulcus since that picture was supposed to be the best one to see the bottom of the fracture.  The captions for the "Skeet Shoot" images says they are upside-down from the track preview images so I rotated #7  ,brightened it up and had a look. It kinds of looks like the frozen waterfalls from my ice climbing days overlaying the top and especially the bottom edge of the rift.  I think this spot is in about the same place as the one with the yellow circle. How about it?  Did I find one of the hot spots?  It shows real well in the .tiff from CICLOPS but the way pluck hacks images I just uploaded a little .jpg.  <img src="http://sitelife.space.com/ver1.0/Content/images/store/4/14/74d04761-5a6c-42be-ae33-8c5fc57afda7.Medium.jpg" alt="" width="258" height="147" />Edit: spelled CICLOPS Cyclops <div class="Discussion_UserSignature"> </div>

3488 · Aug 13, 2008

Replying to: <DIV CLASS='Discussion_PostQuote'> Andrew the photos in your last three posts, those are of the tiger stripes, or sulci right?  I hope we see some eruptions, thanks for the links!  Posted by neuvik</DIV>Hi neuvik. The Cairo Sulcus itself is on the bottom right. There are much smaller previously unseen 'sulci' also, which complicates matters somewhat. Replying to: <DIV CLASS='Discussion_PostQuote'>There is a picture here http://ciclops.org/view.php?id=5156&js=1 about halfway down the page that shows the context image for the close-ups.  They are just tiny portions of the tiger stripes, but yes Sulcus (Sulci ?) are the stripes.  I have been looking forward to searching for hot spots in Damascus Sulcus since that picture was supposed to be the best one to see the bottom of the fracture.  The captions for the "Skeet Shoot" images says they are upside-down from the track preview images so I rotated #7  ,brightened it up and had a look.It kinds of looks like the frozen waterfalls from my ice climbing days overlaying the top and especially the bottom edge of the rift.  I think this spot is in about the same place as the one with the yellow circle.How about it?  Did I find one of the hot spots?  It shows real well in the .tiff from CICLOPS but the way pluck hacks images I just uploaded a little .jpg.  Edit: spelled CICLOPS Cyclops Posted by bobw</DIV>Hi bob,I think you may well have found one of the hot spots. It was very much hoped that the ISS on Cassini would capture some vents during these 'skeet' shots & yes I think you've captured one beautifully.Hi all,Cairo Sulcus at thirteen metres per pixel. Cairo Sulcus itself is in the bottom right. http://ciclops.org/view_media/25114/Enceladus_Rev_80_Flyby_Skeet_Shoot_2<img src="http://sitelife.space.com/ver1.0/Content/images/store/2/8/72b6c355-e885-4a23-a8a4-838d9b5e6e66.Medium.jpg" alt="" />   <table border="0" cellspacing="0" cellpadding="0" width="100%" align="center"><tbody><tr> <td width="15"><img src="http://saturn.jpl.nasa.gov/multimedia/images/images/blank-space.gif" border="0" alt="" hspace="0" width="15" height="1" />

bobw · Aug 13, 2008

At 30 m/pixel if those are really icicles then they are 2.5 -- 3 km long.  Pretty hard to wrap my brain around how to make that on Enceladus

Enceladus, Cassini Spacecraft, Rev 80 Encounter.

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