Difference between revisions of "January 7, 2010"

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<em>image by [mailto:astrovienna@yahoo.com" rel="nofollow Kevin Quin] Vienna, Virginia</em><br />
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<em>image by [mailto:astrovienna@yahoo.com Kevin Quin] Vienna, Virginia</em><br />
 
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Kevin's large original [http://members.cox.net/kevinquin4/MareHumorum20091129.jpg" rel="nofollow mosaic] shows many great details, but what caught my attention on this small scale overview image is the distribution of ridges and mare. Humorum is a multi-ring basin with as many as six rings identified, the most conspicuous being the 425 km diameter one (labeled with 1s) passing through the middle of Gassendi and continuing as massifs east of Mersenius and a little beyond. The [http://the-moon.wikispaces.com/Rupes+Kelvin Kelvin Scarp] on the opposite side is part of this ring. The next ring out (2s) is visible as a rounded short ridge that abuts the north side of Mersenius, and continues as a more massive segment between [http://the-moon.wikispaces.com/R%C3%BCkl+51 de Gasparis and Palmieri.] Smaller isolated hills continue it almost to Lee. The next ring out (3) is more tenuous. Starting at the top there are smaller disconnected hills that seem to define a ring. The best way to identify these rings and others is to rectify this and other phase views to achieve overhead or map views, and then overlay circles of variable diameters to maximize the match with hills. Notice the spaces between the rings - especially at the top where a rubbly texture occurs, perhaps impact ejecta. And see how often mare patches fall into the moats between rings. Such observations can reveal structure where randomness seemed to occur.<br />
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Kevin's large original [http://members.cox.net/kevinquin4/MareHumorum20091129.jpg mosaic] shows many great details, but what caught my attention on this small scale overview image is the distribution of ridges and mare. Humorum is a multi-ring basin with as many as six rings identified, the most conspicuous being the 425 km diameter one (labeled with 1s) passing through the middle of Gassendi and continuing as massifs east of Mersenius and a little beyond. The [https://the-moon.us/wiki/Rupes_Kelvin Kelvin Scarp] on the opposite side is part of this ring. The next ring out (2s) is visible as a rounded short ridge that abuts the north side of Mersenius, and continues as a more massive segment between [https://the-moon.us/wiki/R%C3%BCkl_51 de Gasparis and Palmieri.] Smaller isolated hills continue it almost to Lee. The next ring out (3) is more tenuous. Starting at the top there are smaller disconnected hills that seem to define a ring. The best way to identify these rings and others is to rectify this and other phase views to achieve overhead or map views, and then overlay circles of variable diameters to maximize the match with hills. Notice the spaces between the rings - especially at the top where a rubbly texture occurs, perhaps impact ejecta. And see how often mare patches fall into the moats between rings. Such observations can reveal structure where randomness seemed to occur.<br />
 
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<em>[mailto:tychocrater@yahoo.com" rel="nofollow Chuck Wood]</em><br />
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<em>[mailto:tychocrater@yahoo.com Chuck Wood]</em><br />
 
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<strong>Technical Details</strong><br />
 
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<strong>Related Links</strong><br />
 
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Rükl plate [http://the-moon.wikispaces.com/R%C3%BCkl+51 51]<br />
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Rükl plate [https://the-moon.us/wiki/R%C3%BCkl_51 51]<br />
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Kevin's [http://members.cox.net/kevinquin3/Main.html" rel="nofollow website]<br />
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Kevin's [http://members.cox.net/kevinquin3/Main.html website]<br />
 
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<p><b>Yesterday's LPOD:</b> [[January 6, 2010|Hemisphere]] </p>
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<p><b>Tomorrow's LPOD:</b> [[January 8, 2010|Moon-Crossed]] </p>
 
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<div>You can support LPOD when you buy any book from Amazon thru [http://www.lpod.org/?page_id=591" rel="nofollow LPOD!]<br />
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===COMMENTS?===
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Click on this icon [[image:PostIcon.jpg]] at the upper right to post a comment.
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Latest revision as of 17:48, 13 October 2018

Ridges And Patches

LPOD-Jan7-10.jpg
image by Kevin Quin Vienna, Virginia

Kevin's large original mosaic shows many great details, but what caught my attention on this small scale overview image is the distribution of ridges and mare. Humorum is a multi-ring basin with as many as six rings identified, the most conspicuous being the 425 km diameter one (labeled with 1s) passing through the middle of Gassendi and continuing as massifs east of Mersenius and a little beyond. The Kelvin Scarp on the opposite side is part of this ring. The next ring out (2s) is visible as a rounded short ridge that abuts the north side of Mersenius, and continues as a more massive segment between de Gasparis and Palmieri. Smaller isolated hills continue it almost to Lee. The next ring out (3) is more tenuous. Starting at the top there are smaller disconnected hills that seem to define a ring. The best way to identify these rings and others is to rectify this and other phase views to achieve overhead or map views, and then overlay circles of variable diameters to maximize the match with hills. Notice the spaces between the rings - especially at the top where a rubbly texture occurs, perhaps impact ejecta. And see how often mare patches fall into the moats between rings. Such observations can reveal structure where randomness seemed to occur.

Chuck Wood

Technical Details
2009 Nov 29 from ~02:30 to 04:00 UT. DMK21 and C11 at f/18. 38 panels, each 2000 frames, and 250 to 1000 stacked for each in Registax, deconvolution with Astra Image, and mosaicing in Photoshop.

Related Links
Rükl plate 51
Kevin's website

Yesterday's LPOD: Hemisphere

Tomorrow's LPOD: Moon-Crossed

COMMENTS?

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