Difference between revisions of "May 26, 2004"
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=Triesnecker Rilles= | =Triesnecker Rilles= | ||
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| − | + | [[File:LPOD-2004-05-26.jpeg|LPOD-2004-05-26.jpeg]]</A> | |
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| − | + | <td colspan="2"><div align="center"> | |
| − | + | <p class="main_sm">Image Credit: [mailto:leecht@earthlink.net Tom Leech]</p> | |
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| − | + | <table class="story" border="0" bgcolor="#FFFFFF" width="90%" cellpadding="10" align="center"> | |
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| − | + | <td><p class="Story" align="center"><b>Triesnecker Rilles</b></p> | |
| − | + | <p class="story" align="left">Most rilles fall into one of three categories: sinuous, linear or arcuate. But the rilles near Triesnecker don't. As this high resolution view by Tom Leech demonstrates they are mostly narrow and straightish with some tight curves. The NW-SE trending rille segments are approximately radial to Imbrium, but the N-S and E-W segments aren't. The rilles are not associated with overtly volcanic features such as domes or Cobra Head-like collapse pits. These are unusual, maybe unique rilles. Ejecta from Triesnecker appear to cover the rilles, which must thus be older than that crater. Because some of the rilles cut across other ones there must be an age progression; in general the thinner rilles seem to be older than the wider, more pronounced ones. If these razor thin rilles, like larger linear ones, are surface expressions of igneous dikes, they would have had to be very close to the surface. This is the place in an LPOD writeup where I often provide an explanation, but I don't know why these rilles are here! </p> | |
| − | + | <p class="story" align="left"><b>Technical Details:</b><br> | |
| − | + | Image obtained Feb 4, 2004 with Celestron C-14, Pentax 1.4x teleconverter, Toucam Pro 740k, Toucam software, Registax 1, 160 frames stacked. Further unsharp mask enhancement by CAW.</p> | |
| − | + | <p class="story"><b>Related Links:</b><br> | |
| − | + | [http://www.lpi.usra.edu/research/lunar_orbiter/images/img/iv_102_h1.jpg Lunar Orbiter IV View]<br> | |
| − | + | [http://www.keithlaney.com/ApolloOrbitalimages/AS10/AS10-32-4819.jpg Apollo 10 Oblique View]</p> | |
| − | + | <p class="story"><b>Tomorrow's LPOD:</b> The Jura and a Missing Rim</p> | |
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| − | + | <hr> | |
| − | + | <p align="center" class="main_titles"><b>Author & Editor:</b><br> | |
| − | + | [mailto:tychocrater@yahoo.com Charles A. Wood]</p> | |
| − | + | <p align="center" class="main_titles"><b>Technical Consultant:</b><br> | |
| − | + | [mailto:anthony@perseus.gr Anthony Ayiomamitis]</p> | |
| − | + | <p align="center" class="main_titles"><b>A service of:</b><br> | |
| − | + | [http://www.observingthesky.org/ ObservingTheSky.Org]</p> | |
| − | + | <p align="center" class="main_titles"><b>Visit these other PODs:</b> <br> | |
| − | + | [http://antwrp.gsfc.nasa.gov/apod/astropix.html Astronomy] | [http://www.msss.com/ Mars] | [http://epod.usra.edu/ Earth]</p> | |
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===COMMENTS?=== | ===COMMENTS?=== | ||
Click on this icon [[image:PostIcon.jpg]] at the upper right to post a comment. | Click on this icon [[image:PostIcon.jpg]] at the upper right to post a comment. | ||
Revision as of 18:20, 4 January 2015
Triesnecker Rilles
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Image Credit: Tom Leech |
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Triesnecker Rilles Most rilles fall into one of three categories: sinuous, linear or arcuate. But the rilles near Triesnecker don't. As this high resolution view by Tom Leech demonstrates they are mostly narrow and straightish with some tight curves. The NW-SE trending rille segments are approximately radial to Imbrium, but the N-S and E-W segments aren't. The rilles are not associated with overtly volcanic features such as domes or Cobra Head-like collapse pits. These are unusual, maybe unique rilles. Ejecta from Triesnecker appear to cover the rilles, which must thus be older than that crater. Because some of the rilles cut across other ones there must be an age progression; in general the thinner rilles seem to be older than the wider, more pronounced ones. If these razor thin rilles, like larger linear ones, are surface expressions of igneous dikes, they would have had to be very close to the surface. This is the place in an LPOD writeup where I often provide an explanation, but I don't know why these rilles are here! Technical Details: Related Links: Tomorrow's LPOD: The Jura and a Missing Rim |
Author & Editor:
Charles A. Wood
Technical Consultant:
Anthony Ayiomamitis
A service of:
ObservingTheSky.Org
Visit these other PODs:
Astronomy | Mars | Earth
COMMENTS?
Click on this icon File:PostIcon.jpg at the upper right to post a comment.
