New Iapetian image series |
New Iapetian image series |
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![]() Member ![]() ![]() ![]() Group: Members Posts: 288 Joined: 28-September 05 From: Orion arm Member No.: 516 ![]() |
Hi,
CASSINI has transmitted 184 pics (!) over the last days. Here five takeouts, 3-4x enlargement: Date: 2009-09-06 Distance: 2.228.548 km Filters: CL1 and CL2 Date: 2009-09-08 Distance: 3.215.284 km Filters: P120 and GRN Date: 2009-09-08 Distance: 3.216.610 km Filters: P60 and GRN Date: 2009-09-09 Distance: 3.390.271km Filters: P60 and GRN Date: 2009-09-09 Distance: 3.427.313 km Filters: P120 and GRN Maybe somebody is able to combine some of those images to show more details. Bye. |
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#2
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![]() Senior Member ![]() ![]() ![]() ![]() Group: Members Posts: 1648 Joined: 5-March 05 From: Boulder, CO Member No.: 184 ![]() |
Rob's image in post #125 is a good one to consider also. I redid my fit using the triaxial ellipsoid and allowing for a little scrunching just south of the bellyband on the western side. You can see my fit at this URL:
http://laps.noaa.gov/albers/sos/saturn/iap...o13_gridded.jpg The western limb of this image is still quite a distance away from the Ronceveaux Terra basin. My new fit agrees pretty closely with the older one though I have an offset in both a few degrees to the NW of the ISS map. So every correction that can be made will help though there's still quite some ways to go before I can make the RT basin inconsistency go away. I think that my map agrees with the ISS map (post #122) reasonably well for the Snowman craters and with the gridded ISS image for the Voyager mountains. Perhaps one of them may have to move significantly to really close the basin gap. The Voyager mountain agreement is illustrated at this URL: http://laps.noaa.gov/albers/sos/saturn/iap...o11_gridded.jpg In the middle pair of images the lower one is the ISS fit and the upper one is my (still spherical) fit. I just saw TA's new image so I'll think about that one as well. I see on the raw images page that there's no date or distance info so I wonder if the central longitude has shifted since the July 8 images? -------------------- Steve [ my home page and planetary maps page ]
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#3
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![]() Senior Member ![]() ![]() ![]() ![]() Group: Members Posts: 2530 Joined: 20-April 05 Member No.: 321 ![]() |
Could another component of the "basin gap" be that a broad basin rim shows up as shading on the eastern slopes of the (broad) rim in some lighting and as shading on the western slopes in opposite lighting?
http://www.phys.ncku.edu.tw/~astrolab/mirr...Orbiter4_c1.jpg With Mare Orientale on the Moon, for example, lighting from the east will show the eastern rim mainly as a shadow to the west of the highest level. Lighting from the west will show a shadow to the east of the highest level. This could amount to some 50-100 km perhaps if a basin's rims were really broad. |
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