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=Copernicus on the Limb= | =Copernicus on the Limb= | ||
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| − | + | <td colspan="2"><div align="center"> | |
| − | + | [[File:LPOD-2004-04-09.jpeg|LPOD-2004-04-09.jpeg]]</div> | |
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| − | + | <td><div align="center" span class="main_sm">Image Credit: [mailto:fmallmann@free.fr Frederic Mallmann] and Apollo 17</div></td> | |
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<table class="story" border="0" bgcolor="#FFFFFF" width="90%" cellpadding="10" align="center"><tr><td> | <table class="story" border="0" bgcolor="#FFFFFF" width="90%" cellpadding="10" align="center"><tr><td> | ||
| − | + | <p class="story" align="center"><b>Copernicus on the Limb </b></p> | |
| − | + | <p class="story" align="left"> Ya seen one crater, ya seen em all. Sometimes that's the way it feels. Because the energy involved in impact | |
| − | + | crater formation is so immense, craters of similar size and freshness look pretty much alike. For example, | |
| − | + | consider these two behemoths. The bottom crater is Copernicus, 93 km wide and famous for its great location for | |
| − | + | viewing from Earth. The top image is Housen, 167 km wide and hardly seen at all because its right on the | |
| − | + | southwest limb beyond Bailly. Despite the difference in diameters the craters look very similar - both have | |
| − | + | scarped walls with terraces that step down to the flat floor, which littered with central mountains. Fresh | |
| − | + | impact craters from 40 km in diameter to about 200 km look pretty similar. At larger sizes there is a transition | |
| − | + | to peak ring craters and then multi-ring basins. </p> | |
| − | + | <blockquote> | |
| − | + | <p align="right" class="story">— [mailto:tychocrater@yahoo.com Chuck Wood]</p> | |
| − | + | </blockquote> <p><b>Technical Details:</b><br> | |
| − | + | This magnificent image of Hausen (top) was taken by Frederic Mallmann using the 24" Cassegrain telescope | |
| − | + | at Ludiver Observatory in northern France on 19 Oct. 2003. The telescope worked at f/16 and infrared | |
| − | + | filter was used. A ToUcam was used with 1/25 s exposures and the best 400 of 2700 images were used. | |
| − | + | Full details here:[http://fmallmann.free.fr/dethaus.html http://fmallmann.free.fr/dethaus.html] </p> | |
| − | + | <p>The Copernicus shot (bottom) was made with more | |
| − | + | expensive equipment: Apollo 17. </p> | |
| − | + | <p class="story"><b>Related Links:</b><br> | |
| − | + | [http://fmallmann.free.fr/ Mallmann Web Page]<br> | |
| − | + | [http://www.lpi.usra.edu/research/lunar_orbiter/images/img/iv_193_h2.jpg Lunar Orbiter IV View]</p> | |
| − | + | <p class="story"> <b>Tomorrow's LPOD:</b> Another Farside View</p> | |
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| − | + | <hr> | |
| − | + | <p align="center" class="main_titles"><b>Author & Editor:</b><br> | |
| − | + | [mailto:tychocrater@yahoo.com Charles A. Wood]</p> | |
| − | + | <p align="center" class="main_titles"><b>Technical Consultant:</b><br> | |
| − | + | [mailto:anthony@perseus.gr Anthony Ayiomamitis]</p> | |
| − | + | <p align="center" class="main_titles"><b>A service of:</b><br> | |
| − | + | [http://www.observingthesky.org/ ObservingTheSky.Org]</p> | |
| − | + | <p align="center" class="main_titles"><b>Visit these other PODs:</b> <br> | |
| − | + | [http://antwrp.gsfc.nasa.gov/apod/astropix.html Astronomy] | [http://www.msss.com/ Mars] | [http://epod.usra.edu/ Earth]</p> | |
| − | + | <p> </p> | |
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===COMMENTS?=== | ===COMMENTS?=== | ||
Click on this icon [[image:PostIcon.jpg]] at the upper right to post a comment. | Click on this icon [[image:PostIcon.jpg]] at the upper right to post a comment. | ||
Revision as of 17:18, 4 January 2015
Copernicus on the Limb
 |
Image Credit: Frederic Mallmann and Apollo 17 |
|
Copernicus on the Limb Ya seen one crater, ya seen em all. Sometimes that's the way it feels. Because the energy involved in impact crater formation is so immense, craters of similar size and freshness look pretty much alike. For example, consider these two behemoths. The bottom crater is Copernicus, 93 km wide and famous for its great location for viewing from Earth. The top image is Housen, 167 km wide and hardly seen at all because its right on the southwest limb beyond Bailly. Despite the difference in diameters the craters look very similar - both have scarped walls with terraces that step down to the flat floor, which littered with central mountains. Fresh impact craters from 40 km in diameter to about 200 km look pretty similar. At larger sizes there is a transition to peak ring craters and then multi-ring basins. Technical Details: This magnificent image of Hausen (top) was taken by Frederic Mallmann using the 24" Cassegrain telescope at Ludiver Observatory in northern France on 19 Oct. 2003. The telescope worked at f/16 and infrared filter was used. A ToUcam was used with 1/25 s exposures and the best 400 of 2700 images were used. Full details here:http://fmallmann.free.fr/dethaus.htmlThe Copernicus shot (bottom) was made with more expensive equipment: Apollo 17. Related Links: Tomorrow's LPOD: Another Farside View |
Author & Editor:
Charles A. Wood
Technical Consultant:
Anthony Ayiomamitis
A service of:
ObservingTheSky.Org
Visit these other PODs:
Astronomy | Mars | Earth
COMMENTS?
Click on this icon File:PostIcon.jpg at the upper right to post a comment.
