Difference between revisions of "March 23, 2014"

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=Three Mysteries for the Price of Two=
 
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<em>left image by [mailto:alejandrosanz617@gmail.com" rel="nofollow Alejandro Sanz], Burgos, Spain and right image from LRO Quickmap (NASA/ASU)</em><br />
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<em>left image by [mailto:alejandrosanz617@gmail.com Alejandro Sanz], Burgos, Spain and right image from LRO Quickmap (NASA/ASU)</em><br />
 
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Two things in a larger mosaic by Alex caught my attention and I clipped out just the piece that shows them. Do you notice them?<br />
 
Two things in a larger mosaic by Alex caught my attention and I clipped out just the piece that shows them. Do you notice them?<br />
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Notice on the floor of [http://the-moon.wikispaces.com/Parry Parry] (center, right) the semi-circular edge separating raised and heavily cratered terrain to the east from lower and smoother terrain to the west. The [http://bit.ly/1hSNo4F" rel="nofollow LRO QuickMap] doesn't reveal such a sharp boundary, but the topo data show that the cratered part is 70-80 m higher than the smooth part. This could be a <em>kipuka</em> - a high remnant - of older rocks, but why isn't it covered by the smooth basin ejecta on the west side of the crater floor? The second anomaly I noticed is just to the west of [http://the-moon.wikispaces.com/Tolansky Tolansky], the shadow-filled, 13 km wide simple crater at bottom-center. Do you see the two or three elongated slightly bright, flow-like features? These look like lava flows. But Quickmap shows no hint of them at all. Are they an artifact of processing and my enhancements? Finally, a third feature jumped out when I looked at the Quickmap of this area. Do you see the 2 km wide bright craterlet on the south rim of Parry? Quickmap (right image) reveals a fine tracery of rays extending to the north and west. The lack of rays in other directions suggests that this could be a crater formed by oblique impact. But the craterlet is on the inner slope of Parry's rim, and the north rim of the craterlet is about 700 m lower than the south rim. It may be that the slope directed ejecta to the north and west, even if the impact were vertical.<br />
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Notice on the floor of [https://the-moon.us/wiki/Parry Parry] (center, right) the semi-circular edge separating raised and heavily cratered terrain to the east from lower and smoother terrain to the west. The [http://bit.ly/1hSNo4F LRO QuickMap] doesn't reveal such a sharp boundary, but the topo data show that the cratered part is 70-80 m higher than the smooth part. This could be a <em>kipuka</em> - a high remnant - of older rocks, but why isn't it covered by the smooth basin ejecta on the west side of the crater floor? The second anomaly I noticed is just to the west of [https://the-moon.us/wiki/Tolansky Tolansky], the shadow-filled, 13 km wide simple crater at bottom-center. Do you see the two or three elongated slightly bright, flow-like features? These look like lava flows. But Quickmap shows no hint of them at all. Are they an artifact of processing and my enhancements? Finally, a third feature jumped out when I looked at the Quickmap of this area. Do you see the 2 km wide bright craterlet on the south rim of Parry? Quickmap (right image) reveals a fine tracery of rays extending to the north and west. The lack of rays in other directions suggests that this could be a crater formed by oblique impact. But the craterlet is on the inner slope of Parry's rim, and the north rim of the craterlet is about 700 m lower than the south rim. It may be that the slope directed ejecta to the north and west, even if the impact were vertical.<br />
 
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<em>[mailto:tychocrater@yahoo.com" rel="nofollow Chuck Wood]</em><br />
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<em>[mailto:tychocrater@yahoo.com Chuck Wood]</em><br />
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<em>PS- If you click on QuickMap to increase magnification, when the NAC images appear some are flipped east to west. Check out [http://bit.ly/Q2MThj" rel="nofollow Parry E] and other strips to the west. I have never seen this error before on QuickMap.</em><br />
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<em>PS- If you click on QuickMap to increase magnification, when the NAC images appear some are flipped east to west. Check out [http://bit.ly/Q2MThj Parry E] and other strips to the west. I have never seen this error before on QuickMap.</em><br />
 
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<strong>Technical Details</strong><br />
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<strong>Related Links</strong><br />
 
<strong>Related Links</strong><br />
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<em>[http://lpod.wikispaces.com/21st+Century+Atlas+of+the+Moon 21st Century Atlas]</em> chart 17.<br />
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<em>[[21st Century Atlas of the Moon|21st Century Atlas]]</em> chart 17.<br />
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Alex's [http://www.astrosurf.com/asanz/asanz" rel="nofollow website]<br />
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Alex's [http://www.astrosurf.com/asanz/asanz website]<br />
 
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<p><b>Yesterday's LPOD:</b> [[March 22, 2014|Seeping Out]] </p>
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<p><b>Tomorrow's LPOD:</b> [[March 24, 2014|An 19th Century Marvel]] </p>
 
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Latest revision as of 08:31, 28 October 2018

Three Mysteries for the Price of Two

LPOD-Mar23-14.jpg
left image by Alejandro Sanz, Burgos, Spain and right image from LRO Quickmap (NASA/ASU)

Two things in a larger mosaic by Alex caught my attention and I clipped out just the piece that shows them. Do you notice them?
Notice on the floor of Parry (center, right) the semi-circular edge separating raised and heavily cratered terrain to the east from lower and smoother terrain to the west. The LRO QuickMap doesn't reveal such a sharp boundary, but the topo data show that the cratered part is 70-80 m higher than the smooth part. This could be a kipuka - a high remnant - of older rocks, but why isn't it covered by the smooth basin ejecta on the west side of the crater floor? The second anomaly I noticed is just to the west of Tolansky, the shadow-filled, 13 km wide simple crater at bottom-center. Do you see the two or three elongated slightly bright, flow-like features? These look like lava flows. But Quickmap shows no hint of them at all. Are they an artifact of processing and my enhancements? Finally, a third feature jumped out when I looked at the Quickmap of this area. Do you see the 2 km wide bright craterlet on the south rim of Parry? Quickmap (right image) reveals a fine tracery of rays extending to the north and west. The lack of rays in other directions suggests that this could be a crater formed by oblique impact. But the craterlet is on the inner slope of Parry's rim, and the north rim of the craterlet is about 700 m lower than the south rim. It may be that the slope directed ejecta to the north and west, even if the impact were vertical.

Chuck Wood
PS- If you click on QuickMap to increase magnification, when the NAC images appear some are flipped east to west. Check out Parry E and other strips to the west. I have never seen this error before on QuickMap.

Technical Details
March10, 2014, 19:13 U.T. C11 + 3x powermate + DMK31 + red filter

Related Links
21st Century Atlas chart 17.
Alex's website

Yesterday's LPOD: Seeping Out

Tomorrow's LPOD: An 19th Century Marvel

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