Difference between revisions of "April 24, 2005"

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April 15, 2005. 18" dob + Atik webcam + 5X's barlow + Baader IR passband filter.</p>
 
April 15, 2005. 18" dob + Atik webcam + 5X's barlow + Baader IR passband filter.</p>
 
<p><b>Related Links:</b><br>
 
<p><b>Related Links:</b><br>
[[iv_071_h2.jpg|Lunar Orbiter IV View]]
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[http://www.lpi.usra.edu/resources/lunar_orbiter/images/img/iv_071_h2.jpg Lunar Orbiter IV View]
 
<br>Rukl Plate 68
 
<br>Rukl Plate 68
 
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<p align="center" class="main_titles"><b>Author &amp; Editor:</b><br>  
 
<p align="center" class="main_titles"><b>Author &amp; Editor:</b><br>  
 
[mailto:tychocrater@yahoo.com Charles A. Wood]</p>
 
[mailto:tychocrater@yahoo.com Charles A. Wood]</p>
<p align="center" class="main_titles"><b>Technical Consultant:</b><br>
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[mailto:anthony@perseus.gr Anthony Ayiomamitis]</p>
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<p align="center" class="main_titles"><b>Contact Translator:</b><br>
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[mailto:pablolonnie@yahoo.com.mx Pablo Lonnie Pacheco Railey]  (Es)<br>
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[mailto:chlegrand@free.fr Christian Legrand] (Fr)</p>
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<p align="center" class="main_titles"><b>[mailto:webuser@observingthesky.org Contact Webmaster]</b></p>
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<p align="center" class="main_titles"><b>A service of:</b><br>
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[http://www.observingthesky.org/ ObservingTheSky.Org]</p>
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<p align="center" class="main_titles"><b>Visit these other PODs:</b> <br>
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[http://antwrp.gsfc.nasa.gov/apod/astropix.html Astronomy] | [http://www.msss.com/ Mars] | [http://epod.usra.edu/ Earth]</p>
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Latest revision as of 15:14, 15 March 2015

Fabulous Fab!

LPOD-2005-04-24.jpeg

Image Credit: Mike Wirths


Fabulous Fab!

Have you ever looked carefully at Fabricius? I hadn’t until I studied this great image. Usually Fabricius is seen as an obstruction hiding part of the floor of the large crater Janssen, but it is a fascinating crater in its own right. Fabricius (diameter 78 km) is mostly a Tycho-like complex crater, with terraced rim, flat floor and central peak. But the floor contains a horseshoe-like massive ridge. This is does not make Fabricius a floor-fractured crater - their concentric pattern is of rilles. I would guess that the floor arc of Fabricius formed by a terrace sliding down the crater walls. The ridge is completely free of the wall on the NW side, but is adjacent to the SE wall, like a normal terrace. On the southern portion of the floor a small crater occurs in the middle of a short rille, one of the few in a highlands crater. The rim of Fabricius has two abnormalities to notice. On the left (S), an angular scallop suggests that a large rim collapse started but didn't collapse entirely. At the bottom (W) of the crater a thin ridge extends from the rim onto the adjacent highland and then curves back. This looks like another place where a rim scallop subsided only slightly. Compare this image with the Lunar Orbiter IV image - they have essentially the same resolution!

Chuck Wood

Technical Details:
April 15, 2005. 18" dob + Atik webcam + 5X's barlow + Baader IR passband filter.

Related Links:
Lunar Orbiter IV View
Rukl Plate 68

Yesterday's LPOD: The Best Lava Flow on the Moon

Tomorrow's LPOD: A Chain of Mystery



Author & Editor:
Charles A. Wood

 


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