First images of Vesta comming in.
Does this qualify at this size as an example of 'spalling'?
Observing the patterns across the subsidence area, and even asteroid body wide, reminds me that I have seen this in the fusion crust of an H5 chondrite at slight magnification, on Mars in areas, in Earth suevite impacted materials, and even in the micro/macroscopic images of stardust particle trails in the 'Aerogel' silica materials.
Did the subsidence happen with liquefaction of the original asteroid, or, did the body issue volatiles in massive amounts along with the loss and movement of solids?
A simple altered 8 tone view of the patterns.
The original has much better detail. The early anaglyph is attached here for those with 3D glasses, also slightly altered.
This popular site link has additional general information. link.
http://dawn.jpl.nasa.gov/multimedia/images/imageoftheday/201109/090911_033_full.jpg Any ideas in there striations? We see then on Deimos and Phobos too. There are some quite fine lines too.
The striations don't bother me as much as the craters themselves. Look closely at the Vesta craters-there are no high ridges to them like one would see on the Moon. Compare the 2 moons.
I expect that early Vesta is or at least was a very hot thick putty-like molten rock that simply absorbed any flying meteor at the time of gathering material in its orbit. They went 'plunk' right into the face of a soft Vesta.
Hey, this idea could explain the 'striations' that have now solidified in cold space you talk about, John!
dx....thanks for looking. I pored over the image with a magnifier for over an hour. Now, that largest crater, look at the the NEXT largest crater (2:00) there are very FINE striations that go right through the crater. This tells me what ever caused the striations, happened after the crater was formed. I'm waiting for the images daily, as the orbit keeps getting lower. BTW, have you studiedhttp://solarsystem.nasa.gov/news/images/inset-20071206-24616-2.jpg at the images of Pan and Atlas?
I can't go beyond in thought what the images represent. I always had a bad feeling about Vesta...yeah, bad feeling. It is nothing but a previous molten rock from some 4.3 billion years ago absorbing anything its coincidental path of orbit- hot or cold objects-BORING-NO life here at all.. [Don't go beyond this thought] its not necessary...you will see from the eventual DAWN site report that not much info will be gathered. Its a dead rock with lifeless info and so, 'what-it-is-I-saw-it' report or data sheet will emerge in 7 years time. No News is.......
But, CERES is another matter. This is the moon I await.
http://www.spacetoday.org/images/Japan/MUSES_C/FalconAsteroidItokawa.jpg Another type of asteroid. Smaller and devoid of craters. What other differences are there?
Glad to see the interest. What are we gonna talk about when Oppy is wintering?????
Thanks for the links, Dana. Interesting.
Here it is on the striations of Vesta.
They are from meteorites that have grazed the surface and not actually penetrated the soil. If one looks closely one can see the beginning and an end to grooves the meteorite made. It starts with a small groove as one's finger would glance over the icing of a birthday cake and then subtly disappears at the other end. Perhaps on the next orbit of Vesta it collided with its surface due to various alignments in zero gravity space.
Or of course what I said in 8 above. Who knows for sure.
Can't you think other then link!
Me thinks very well. I simply try to ensure we are seeing the same things prior to proffering a theory.
Dx....you have read nothing and (or) looked at nothing in this thread. And you are going to tell ME to think other than link????? If you HAD read and studied the images, YOU might think.
http://dawn.jpl.nasa.gov/multimedia/images/RC3_color_05-full.jpg Can anybody posit a theory about the equatorial ridges other than a meteorite that "grazed the surface"? These channels/ridges encircle the asteroids equatorial region. Not much evidence at all for grazing meteorites, not much evidence at ALL.
http://www.salzgeber.at/astro/moon/schiller2.jpg Here is a fine example of an elongated impact crater. No, it doesn't go ALL the way AROUND the moon and not just near the equator. THINK, man, THINK.