Difference between revisions of "May 16, 2013"
| Line 2: | Line 2: | ||
=Lonesome Chain= | =Lonesome Chain= | ||
| − | + | <!-- ws:start:WikiTextHeadingRule:0:<h1> --> | |
| − | + | <!-- ws:start:WikiTextLocalImageRule:14:<img src="/file/view/LPOD-May16-13.jpg/431945532/LPOD-May16-13.jpg" alt="" title="" /> -->[[File:LPOD-May16-13.jpg|LPOD-May16-13.jpg]]<!-- ws:end:WikiTextLocalImageRule:14 --><br /> | |
<em>approximate north up image by [mailto:mwirths@superaje.com Mike Wirths], Baja California, Mexico</em><br /> | <em>approximate north up image by [mailto:mwirths@superaje.com Mike Wirths], Baja California, Mexico</em><br /> | ||
<br /> | <br /> | ||
| − | |||
<table class="wiki_table"> | <table class="wiki_table"> | ||
| − | + | <tr> | |
| − | + | <td><!-- ws:start:WikiTextLocalImageRule:15:<img src="/file/view/LPOD-May16-13b.jpg/431945594/LPOD-May16-13b.jpg" alt="" title="" /> -->[[File:LPOD-May16-13b.jpg|LPOD-May16-13b.jpg]]<!-- ws:end:WikiTextLocalImageRule:15 --><br /> | |
</td> | </td> | ||
| − | + | <td>Hainzel A and B were probably formed by the simultaneous impact of a split comet or asteroid. Hainzel may have been a pre-existing older crater or perhaps was formed slightly earlier as part of the A/B collisions. What is remarkable is the very asymmetric distribution of ejecta. There is very little in any direction except to the north towards Ramsden. A broad swath of radial ridges and gullies extend from A about 30 km. Beyond that a single squiggly chain of secondaries goes 150 km from the crater rim to the edge of the mare. The chain extends another 35-40 km across the mare with a surrounding pin-pricks of brightness. The LRO QuickMap [http://target.lroc.asu.edu/da/qmap.html?mv=eqc&mcx=-933586.33233&mcy=-1045338.80016&mz=8 shows] this extension across the mare to be a classic herringbone secondary chain with slightly overlapping craters wrapped in ejecta, making a v-pattern. This entire 190 km long chain is radial to the intersection of A and B, rather than the center of A. This seems to be strong evidence that A and B did form simultaneously. I can't see evidence of the herringbone pattern anywhere along the chain except where it cuts the mare. Perhaps the highland terrain is too rough for it to form.<br /> | |
<br /> | <br /> | ||
<em>[mailto:tychocrater@yahoo.com Chuck Wood]</em><br /> | <em>[mailto:tychocrater@yahoo.com Chuck Wood]</em><br /> | ||
| Line 22: | Line 21: | ||
<em>[http://lpod.wikispaces.com/21st+Century+Atlas+of+the+Moon 21st Century Atlas]</em> chart 24.<br /> | <em>[http://lpod.wikispaces.com/21st+Century+Atlas+of+the+Moon 21st Century Atlas]</em> chart 24.<br /> | ||
</td> | </td> | ||
| − | + | </tr> | |
</table> | </table> | ||
| − | |||
<br /> | <br /> | ||
<hr /> | <hr /> | ||
| − | |||
| − | |||
| − | |||
| − | |||
| − | |||
Revision as of 23:46, 2 January 2015
Lonesome Chain
approximate north up image by Mike Wirths, Baja California, Mexico
 |
Hainzel A and B were probably formed by the simultaneous impact of a split comet or asteroid. Hainzel may have been a pre-existing older crater or perhaps was formed slightly earlier as part of the A/B collisions. What is remarkable is the very asymmetric distribution of ejecta. There is very little in any direction except to the north towards Ramsden. A broad swath of radial ridges and gullies extend from A about 30 km. Beyond that a single squiggly chain of secondaries goes 150 km from the crater rim to the edge of the mare. The chain extends another 35-40 km across the mare with a surrounding pin-pricks of brightness. The LRO QuickMap shows this extension across the mare to be a classic herringbone secondary chain with slightly overlapping craters wrapped in ejecta, making a v-pattern. This entire 190 km long chain is radial to the intersection of A and B, rather than the center of A. This seems to be strong evidence that A and B did form simultaneously. I can't see evidence of the herringbone pattern anywhere along the chain except where it cuts the mare. Perhaps the highland terrain is too rough for it to form.
|
