Difference between revisions of "December 27, 2013"
| Line 1: | Line 1: | ||
__NOTOC__ | __NOTOC__ | ||
=Two Little Known Valleys= | =Two Little Known Valleys= | ||
| − | |||
<!-- ws:start:WikiTextHeadingRule:0:<h1> --> | <!-- ws:start:WikiTextHeadingRule:0:<h1> --> | ||
<!-- ws:start:WikiTextLocalImageRule:6:<img src="/file/view/LPOD-Dec27-13.jpg/479507730/LPOD-Dec27-13.jpg" alt="" title="" /> -->[[File:LPOD-Dec27-13.jpg|LPOD-Dec27-13.jpg]]<!-- ws:end:WikiTextLocalImageRule:6 --><br /> | <!-- ws:start:WikiTextLocalImageRule:6:<img src="/file/view/LPOD-Dec27-13.jpg/479507730/LPOD-Dec27-13.jpg" alt="" title="" /> -->[[File:LPOD-Dec27-13.jpg|LPOD-Dec27-13.jpg]]<!-- ws:end:WikiTextLocalImageRule:6 --><br /> | ||
| − | <em>left image by [mailto:gtarsoudis@gmail.com George Tarsoudis], and right image from [http://bit.ly/K8PBPp LRO QuickMap]</em><br /> | + | <em>left image by [mailto:gtarsoudis@gmail.com" rel="nofollow George Tarsoudis], and right image from [http://bit.ly/K8PBPp" rel="nofollow LRO QuickMap]</em><br /> |
<br /> | <br /> | ||
| − | In an excellent new [http://www.lunar-captures.com/craters_C_files/131220_Cleomedes_Burchardt_Geminus_Tar.jpg mosaic] of the area north of Mare Crisium, George noted a linear shadow striking towards the southeast from the southern edge of the complex crater [http://the-moon.wikispaces.com/Geminus Geminus].<br /> | + | In an excellent new [http://www.lunar-captures.com/craters_C_files/131220_Cleomedes_Burchardt_Geminus_Tar.jpg" rel="nofollow mosaic] of the area north of Mare Crisium, George noted a linear shadow striking towards the southeast from the southern edge of the complex crater [http://the-moon.wikispaces.com/Geminus Geminus].<br /> |
The much higher Sun LRO Quickmap reveals two linear features here; George's shadowed feature is the southern one. I had not noticed these before and down't know what<br /> | The much higher Sun LRO Quickmap reveals two linear features here; George's shadowed feature is the southern one. I had not noticed these before and down't know what<br /> | ||
tectonic forces caused their formation. The top one looks like a typical, but wide, flat-floored graben; it is about 60 km long and 7 km wide. The southern linear feature has more of a<br /> | tectonic forces caused their formation. The top one looks like a typical, but wide, flat-floored graben; it is about 60 km long and 7 km wide. The southern linear feature has more of a<br /> | ||
| Line 14: | Line 13: | ||
but their origin remain uncertain to me.<br /> | but their origin remain uncertain to me.<br /> | ||
<br /> | <br /> | ||
| − | <em>[mailto:tychocrater@yahoo.com Chuck Wood]</em><br /> | + | <em>[mailto:tychocrater@yahoo.com" rel="nofollow Chuck Wood]</em><br /> |
<br /> | <br /> | ||
<strong>Technical Details</strong><br /> | <strong>Technical Details</strong><br /> | ||
| Line 21: | Line 20: | ||
<strong>Related Links</strong><br /> | <strong>Related Links</strong><br /> | ||
<em>[http://lpod.wikispaces.com/21st+Century+Atlas+of+the+Moon 21st Century Atlas]</em> chart 1.<br /> | <em>[http://lpod.wikispaces.com/21st+Century+Atlas+of+the+Moon 21st Century Atlas]</em> chart 1.<br /> | ||
| − | George's [ | + | George's [/www.lunar-captures.com website]<br /> |
<br /> | <br /> | ||
<hr /> | <hr /> | ||
Revision as of 22:54, 4 January 2015
Two Little Known Valleys
left image by " rel="nofollow George Tarsoudis, and right image from " rel="nofollow LRO QuickMap
In an excellent new " rel="nofollow mosaic of the area north of Mare Crisium, George noted a linear shadow striking towards the southeast from the southern edge of the complex crater Geminus.
The much higher Sun LRO Quickmap reveals two linear features here; George's shadowed feature is the southern one. I had not noticed these before and down't know what
tectonic forces caused their formation. The top one looks like a typical, but wide, flat-floored graben; it is about 60 km long and 7 km wide. The southern linear feature has more of a
gentle vee-shaped floor and trends in a very slightly different direction than the northern valley. The northern valley is exactly radial to the central peaks of Geminus, suggesting that
it could be a secondary crater chain or radial fracture associated with that crater. But Geminus is very fresh - notice its sharp rim crest - and these valleys are not. Nor are they radial
to any nearby basin, and in fact, they cut at an oblique angle the Geminus - Berosus outer rim of the Crisium Basin. George's linear shadow does mark a little known pair of valleys,
but their origin remain uncertain to me.
" rel="nofollow Chuck Wood
Technical Details
Dec 20, 2013. Telescope SkyWatcher 14 inch @f/4.5, camera QHY 5L-II, filter IR-pass, barlow 3X, mosaic 2 images. Condition with pure seeing, good transparency.
Related Links
21st Century Atlas chart 1.
George's [/www.lunar-captures.com website]
