Difference between revisions of "October 28, 2013"
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| − | <em>image by [mailto:dpeach_78@yahoo.co.uk | + | <em>image by [mailto:dpeach_78@yahoo.co.uk Damian Peach], U.K.</em><br /> |
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| − | The well-known rille that crosses the center of the floor of [http://the-moon.wikispaces.com/Fracastorius Fracastorius] crater is well shown, as are a variety of less frequently imaged rilles roughly perpendicular to the main one. Better seen than on any other terrestrial image I've found is the narrow rille that almost hugs the eastern floor of the crater, nearly in contact with the eastern wall. According to measurements from the LRO [http://bit.ly/16DbOP2 | + | The well-known rille that crosses the center of the floor of [http://the-moon.wikispaces.com/Fracastorius Fracastorius] crater is well shown, as are a variety of less frequently imaged rilles roughly perpendicular to the main one. Better seen than on any other terrestrial image I've found is the narrow rille that almost hugs the eastern floor of the crater, nearly in contact with the eastern wall. According to measurements from the LRO [http://bit.ly/16DbOP2 QuickMap] this rille is only about 400 m wide. The southern (bottom) half of the floor of Fracastorius has a slightly swirled surface reminiscent of impact melt, but melt is unlikely to be visible in such an old crater that is so shallow. Melt should have veneered the original crater floor which must be buried beneath hundreds of meters of later fill of ejecta from other craters and basins.<br /> |
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| − | <em>[mailto:tychocrater@yahoo.com | + | <em>[mailto:tychocrater@yahoo.com Chuck Wood]</em><br /> |
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<strong>Technical Details</strong><br /> | <strong>Technical Details</strong><br /> | ||
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<strong>Related Links</strong><br /> | <strong>Related Links</strong><br /> | ||
| − | <em>[http://21st+Century+Atlas+of+the+Moon | + | <em>[http://21st+Century+Atlas+of+the+Moon 21st Century Atlas]</em> chart 6.<br /> |
A synoptic [http://lpod.wikispaces.com/January+24%2C+2013 view]<br /> | A synoptic [http://lpod.wikispaces.com/January+24%2C+2013 view]<br /> | ||
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Revision as of 17:11, 11 January 2015
The Real Fracastorius
image by Damian Peach, U.K.
The well-known rille that crosses the center of the floor of Fracastorius crater is well shown, as are a variety of less frequently imaged rilles roughly perpendicular to the main one. Better seen than on any other terrestrial image I've found is the narrow rille that almost hugs the eastern floor of the crater, nearly in contact with the eastern wall. According to measurements from the LRO QuickMap this rille is only about 400 m wide. The southern (bottom) half of the floor of Fracastorius has a slightly swirled surface reminiscent of impact melt, but melt is unlikely to be visible in such an old crater that is so shallow. Melt should have veneered the original crater floor which must be buried beneath hundreds of meters of later fill of ejecta from other craters and basins.
Chuck Wood
Technical Details
September 24, 2013. C14.
Related Links
21st Century Atlas chart 6.
A synoptic view
