Difference between revisions of "February 23, 2013"
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=Railway Tracks= | =Railway Tracks= | ||
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<em>This is a classic LPOD from Dec 30, 2008.</em><br /> | <em>This is a classic LPOD from Dec 30, 2008.</em><br /> | ||
<br /> | <br /> | ||
| − | Can you imagine being in lunar orbit and seeing scenes like this passing by? A number of new stills from the Kaguya HDTV | + | Can you imagine being in lunar orbit and seeing scenes like this passing by? A number of new stills from the Kaguya HDTV |
| − | are now available including this remarkable view looking north over the [ | + | are now available including this remarkable view looking north over the [https://the-moon.us/wiki/Rimae_Hippalus Hippalus Rilles]. [https://the-moon.us/wiki/Campanus Campanus] is the crater with a rille on |
| − | its floor at bottom right, and Hippalus is the large crater near the middle whose left side is missing and is embayed by lavas | + | its floor at bottom right, and Hippalus is the large crater near the middle whose left side is missing and is embayed by lavas |
| − | from Mare Humorum. It is not completely clear why mare-facing crater walls disappear, but this oblique view shows that the | + | from Mare Humorum. It is not completely clear why mare-facing crater walls disappear, but this oblique view shows that the |
| − | wall becomes progressively lower from its high right side until it disappears. This means that Hippalus formed on sloping | + | wall becomes progressively lower from its high right side until it disappears. This means that Hippalus formed on sloping terrain and/or it was tilted inward as the basin's center subsided, and then was covered by lavas. The oblique view also suggests |
| − | + | that the floor of Campanus is at a higher level than the mare surface outside it to the right. This isn't certain, but if true means | |
| − | that the floor of Campanus is at a higher level than the mare surface outside it to the right. This isn't certain, but if true means | + | that the mare and the lava inside the crater were not fed from the same reservoir. |
| − | that the mare and the lava inside the crater were not fed from the same reservoir.<br /> | + | <br /> |
<br /> | <br /> | ||
<em>[mailto:tychocrater@yahoo.com Chuck Wood]</em><br /> | <em>[mailto:tychocrater@yahoo.com Chuck Wood]</em><br /> | ||
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<td><strong>2013 Update</strong><br /> | <td><strong>2013 Update</strong><br /> | ||
| − | Using the LRO QuickMap altimetry data | + | Using the LRO QuickMap altimetry data |
| − | it is now possible to check the 2nd to last | + | it is now possible to check the 2nd to last |
| − | statement above about the height of lava | + | statement above about the height of lava |
| − | inside Campanus compared to nearby Mare | + | inside Campanus compared to nearby Mare |
| − | Nubium. The floor is slightly domed but | + | Nubium. The floor is slightly domed but |
| − | actually about 1.3 km LOWER than the | + | actually about 1.3 km LOWER than the |
| − | mare! Off the bottom right corner is another | + | mare! Off the bottom right corner is another |
| − | mare-floored crater, Mercator, whose floor | + | mare-floored crater, Mercator, whose floor |
| − | is the same elevation as the mare. That | + | is the same elevation as the mare. That suggests that Mercator may have been fed by |
| − | + | the same source as the mare but Campanus' | |
| − | the same source as the mare but Campanus' | + | lavas had a source with a different hydrostatic |
| − | lavas had a source with a different hydrostatic | + | pressure. |
| − | pressure.<br /> | + | <br /> |
</td> | </td> | ||
</tr> | </tr> | ||
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<strong>Related Links</strong><br /> | <strong>Related Links</strong><br /> | ||
| − | Rükl plate [ | + | Rükl plate [https://the-moon.us/wiki/Rükl_53 53]<br /> |
<br /> | <br /> | ||
<p><b>Yesterday's LPOD:</b> [[February 22, 2013|Another Passing of the Apollo Era]] </p> | <p><b>Yesterday's LPOD:</b> [[February 22, 2013|Another Passing of the Apollo Era]] </p> | ||
Latest revision as of 18:46, 13 October 2018
Railway Tracks
image from Kaguya Archives
This is a classic LPOD from Dec 30, 2008.
Can you imagine being in lunar orbit and seeing scenes like this passing by? A number of new stills from the Kaguya HDTV
are now available including this remarkable view looking north over the Hippalus Rilles. Campanus is the crater with a rille on
its floor at bottom right, and Hippalus is the large crater near the middle whose left side is missing and is embayed by lavas
from Mare Humorum. It is not completely clear why mare-facing crater walls disappear, but this oblique view shows that the
wall becomes progressively lower from its high right side until it disappears. This means that Hippalus formed on sloping terrain and/or it was tilted inward as the basin's center subsided, and then was covered by lavas. The oblique view also suggests
that the floor of Campanus is at a higher level than the mare surface outside it to the right. This isn't certain, but if true means
that the mare and the lava inside the crater were not fed from the same reservoir.
Chuck Wood
 |
2013 Update Using the LRO QuickMap altimetry data
it is now possible to check the 2nd to last
statement above about the height of lava
inside Campanus compared to nearby Mare
Nubium. The floor is slightly domed but
actually about 1.3 km LOWER than the
mare! Off the bottom right corner is another
mare-floored crater, Mercator, whose floor
is the same elevation as the mare. That suggests that Mercator may have been fed by
the same source as the mare but Campanus'
lavas had a source with a different hydrostatic
pressure.
|
Related Links
Rükl plate 53
Yesterday's LPOD: Another Passing of the Apollo Era
Tomorrow's LPOD: Camouflage Moon
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