Difference between revisions of "August 16, 2008"

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<em>image by [mailto:HP-Unigraph@gmx.de Harald Paleske], Langendorf, Germany</em><br />
 
<em>image by [mailto:HP-Unigraph@gmx.de Harald Paleske], Langendorf, Germany</em><br />
 
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Beyond [http://lpod.wikispaces.com/August+4%2C+2008 Bailly], almost (85° W longitude) on the mean limb, is a large crater that is infrequently seen. With a diameter of 149 (or 163 km according to IAU and Rükl, respectively), [http://the-moon.wikispaces.com/Drygalski Drygalski] is ~50% larger than Copernicus. The only nearside craters with a relatively fresh classical Copernican look that are bigger are nearby [http://www.lpod.org/archive/archive/2004/04/LPOD-2004-04-09.htm Hausen] (167 km) and distant [http://www.lpod.org/?m=20060307 Humboldt] (207 km) and [http://www.lpod.org/archive/archive/2004/01/LPOD-2004-01-07.htm Petavius] (177 km). Why are these big craters near the limb? Harald's large scale image of Drygalski shows the smooth floor, and hints at the rougher floor behind the central peak. A terrace is visible on the left wall but the right wall seems more disorganized, probably because of the larger number of craters that cut that side, visible both here and in the Lunar Orbiter IV [http://the-moon.wikispaces.com/Drygalski view]. <br />
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Beyond [http://www2.lpod.org/wiki/August_4,_2008 Bailly], almost (85° W longitude) on the mean limb, is a large crater that is infrequently seen. With a diameter of 149 (or 163 km according to IAU and Rükl, respectively), [https://the-moon.us/wiki/Drygalski Drygalski] is ~50% larger than Copernicus. The only nearside craters with a relatively fresh classical Copernican look that are bigger are nearby [[April_9,_2004|Hausen]] (167 km) and distant [[March_7,_2006|view]]. <br />
 
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<em>[mailto:tychocrater@yahoo.com Chuck Wood]</em><br />
 
<em>[mailto:tychocrater@yahoo.com Chuck Wood]</em><br />
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Harald's excellent Solar (with Moon coming) [http://www.unigraph.de/ website]<br />
 
Harald's excellent Solar (with Moon coming) [http://www.unigraph.de/ website]<br />
 
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<p><b>Yesterday's LPOD:</b> [[August 15, 2008|Full Moon Secrets]] </p>
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<p><b>Tomorrow's LPOD:</b> [[August 17, 2008|Just an Eclipse]] </p>
 
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Latest revision as of 08:23, 28 October 2018

Limb Magic

LPOD-Aug16-08.jpg
image by Harald Paleske, Langendorf, Germany

Beyond Bailly, almost (85° W longitude) on the mean limb, is a large crater that is infrequently seen. With a diameter of 149 (or 163 km according to IAU and Rükl, respectively), Drygalski is ~50% larger than Copernicus. The only nearside craters with a relatively fresh classical Copernican look that are bigger are nearby Hausen (167 km) and distant view.

Chuck Wood

Technical Details
2008-07-26, 4:42 UT. 408mm Newton f 8, 5 m, DMK 1/30sec. exposure, red filter, stack of 300 frames, 3 picture mosaic; seeing good (7/10)

Related Links
Rükl plates 72 & VI
Harald's excellent Solar (with Moon coming) website

Yesterday's LPOD: Full Moon Secrets

Tomorrow's LPOD: Just an Eclipse



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