Difference between revisions of "October 18, 2011"
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=Less of a Mystery?= | =Less of a Mystery?= | ||
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| − | <em>image by [mailto:bart.declercq@gmail.com Bart Declercq]</em><br /> | + | <em>image by [mailto:bart.declercq@gmail.com" rel="nofollow Bart Declercq]</em><br /> |
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A few days ago [http://lpod.wikispaces.com/October+13%2C+2011 LPOD] featured a relatively high Sun view of a suspiciously circular feature (SCF) in southern Mare Serenitatis.<br /> | A few days ago [http://lpod.wikispaces.com/October+13%2C+2011 LPOD] featured a relatively high Sun view of a suspiciously circular feature (SCF) in southern Mare Serenitatis.<br /> | ||
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<em>been</em> <em>quite cool to find such a large unknown feature on the Moon!)</em> That is the most likely explanation but not the most satisfying.<br /> | <em>been</em> <em>quite cool to find such a large unknown feature on the Moon!)</em> That is the most likely explanation but not the most satisfying.<br /> | ||
The SCF does break the trend of the shore-following mare ridges, which is consistent with a crater having deformed the direction<br /> | The SCF does break the trend of the shore-following mare ridges, which is consistent with a crater having deformed the direction<br /> | ||
| − | of the later-formed ridges. LRO's [http://target.lroc.asu.edu/da/qmap.html Quick Map] shows a small shadow casting feature at the SCF's center which could be a hill that<br /> | + | of the later-formed ridges. LRO's [http://target.lroc.asu.edu/da/qmap.html" rel="nofollow Quick Map] shows a small shadow casting feature at the SCF's center which could be a hill that<br /> |
is the unburied top of a central peak. (Or maybe not, there is no NAC image of that area). Finally, there does seem to be a hint of<br /> | is the unburied top of a central peak. (Or maybe not, there is no NAC image of that area). Finally, there does seem to be a hint of<br /> | ||
a curved ridge on the west (left) side that completes the rim, and is not part of the main mare ridges. I think Bart's interpretation is<br /> | a curved ridge on the west (left) side that completes the rim, and is not part of the main mare ridges. I think Bart's interpretation is<br /> | ||
probably right, but it would be more interesting if it isn't.<br /> | probably right, but it would be more interesting if it isn't.<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 /> | ||
Revision as of 22:22, 4 January 2015
Less of a Mystery?
image by " rel="nofollow Bart Declercq
A few days ago LPOD featured a relatively high Sun view of a suspiciously circular feature (SCF) in southern Mare Serenitatis.
The question was if the feature (in the center of this image) was a buried impact crater. Bart and a few others have sent images
with better illumination. Here is what Bart says: As far as I can tell from my images, part of the "rim" of this ghost crater seems
to be formed by a coincidental string of small impact craters, two other parts by ripples in the mare lava. The central "peak" is
just a flat white spot (perhaps a couple of craters too small to resolve individually and young enough to have bright ejecta blankets.
In all, it's probably more a testament to the human ability to see patterns everywhere than a real ghost crater (a pity, would have
been quite cool to find such a large unknown feature on the Moon!) That is the most likely explanation but not the most satisfying.
The SCF does break the trend of the shore-following mare ridges, which is consistent with a crater having deformed the direction
of the later-formed ridges. LRO's " rel="nofollow Quick Map shows a small shadow casting feature at the SCF's center which could be a hill that
is the unburied top of a central peak. (Or maybe not, there is no NAC image of that area). Finally, there does seem to be a hint of
a curved ridge on the west (left) side that completes the rim, and is not part of the main mare ridges. I think Bart's interpretation is
probably right, but it would be more interesting if it isn't.
" rel="nofollow Chuck Wood
Technical Details
30cm Orion Optics Newtonian telescope and Basler Ace a1300 camera (1296x966 resolution) and an Astronomik Red filter - image
scale is about 0.15"/pixel.
Related Links
Rükl plate 24
