Difference between revisions of "May 24, 2009"
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<strong>Related Links</strong><br /> | <strong>Related Links</strong><br /> | ||
| − | Rükl plate [https://the-moon.us/wiki/ | + | Rükl plate [https://the-moon.us/wiki/Rükl_18 18]<br /> |
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<p><b>Yesterday's LPOD:</b> [[May 23, 2009|Rilleorama]] </p> | <p><b>Yesterday's LPOD:</b> [[May 23, 2009|Rilleorama]] </p> | ||
Revision as of 20:54, 18 August 2018
Tiny New Rille & Broad Mare Ridge
image by Pascal Bayle, France. Original below, enhanced above.
Features that used to be nearly unknown a decade ago are now becoming familiar. The Marius Rille, a sinuous, long lava channel that seems languidly draped across southern Oceanus Procellarum is a case in point. Rükl gives a length of 250 km, with the width narrowing from 2 km near its starting position (right) to to 500 m at its end (left), where it is still visible in Pascal's image. This image also shows what appears to be a fainter rille near top-left that I don't remember noticing before. But looking back it is just visible on a Lunar Orbiter IV image and a previous view of the Marius Rille (which also includes nomenclature). This short rille appears to be more tightly sinuous than the longer one. I keep having vague recollections that I must have seen it before - perhaps in Apollo images - but I can't find any view better than Pascal's. Another subtle thing to notice is the great width of the swell associated with the unnamed mare ridge at the upper left - see the sharp, but shallow change in slope just west of the crater Marius P?
Chuck Wood
Technical Details
8 Jan 2009 at 20:54:31 ut. 14" scope + DMK 21AF04 + POWERMATE x2.5
Related Links
Rükl plate 18
Yesterday's LPOD: Rilleorama
Tomorrow's LPOD: The Case of the Missing Mare
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