Difference between revisions of "October 11, 2006"

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<p>[[File:Laperouse.jpg|laperouse.jpg]]<br />
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<em>image by [mailto:dpeach_78@yahoo.co.uk Damian Peach]</em></p>
 
<em>image by [mailto:dpeach_78@yahoo.co.uk Damian Peach]</em></p>
 
<p>Maybe it has been imaged before - as the center of attention, not in a broad field of view - but I&#8217;ve never seen the photo. La Perouse is one of a relatively large number of limb craters that are not often observed and are even harder to identify. La Perouse is limbward of Langrenus in a seldom seen area. At 77 km in diameter it is typical complex crater with terraces, central peak and relatively flat foor. It is a larger version of Kapteyn, another rarely identified crater at bottom left. La Perouse is a fairly fresh crater - although it does have a later impact on its floor - but the Clementine high Sun [http://pdsmaps.wr.usgs.gov/explorer-bin/mapmars4.cgi?WHEREFROM=PZ&#038;VERSION=INTERMEDIATE&#038;DATA_SET_NAME=moon_clementine_bw&#038;PIXEL_TYPE=BIT8&#038;SCALE=pixels/degree&#038;PROJECTION=SINUSOIDAL&#038;RESOLUTION=16&#038;RESAMP_METHOD=NEAREST_NEIGHBOR&#038;BANDS_SELECTED=&#038;FORMAT=JPEG&#038;LONBOX=32&#038;LATBOX=32&#038;GRIDLINE_FREQUENCY=none&#038;STRETCH=AUTO&#038;LAT=-4&#038;LON=75&#038;LINE=512&#038;SAMP=512 view] shows it has no ray system and thus is probably more than a billion years old. Damian&#8217;s oblique look from Earth nicely shows the slumped terraces and a significant scarp at the top of the eastern wall. This is probably another [http://www.lpod.org/?m=20060926 steep] place on the Moon.</p>
 
<p>Maybe it has been imaged before - as the center of attention, not in a broad field of view - but I&#8217;ve never seen the photo. La Perouse is one of a relatively large number of limb craters that are not often observed and are even harder to identify. La Perouse is limbward of Langrenus in a seldom seen area. At 77 km in diameter it is typical complex crater with terraces, central peak and relatively flat foor. It is a larger version of Kapteyn, another rarely identified crater at bottom left. La Perouse is a fairly fresh crater - although it does have a later impact on its floor - but the Clementine high Sun [http://pdsmaps.wr.usgs.gov/explorer-bin/mapmars4.cgi?WHEREFROM=PZ&#038;VERSION=INTERMEDIATE&#038;DATA_SET_NAME=moon_clementine_bw&#038;PIXEL_TYPE=BIT8&#038;SCALE=pixels/degree&#038;PROJECTION=SINUSOIDAL&#038;RESOLUTION=16&#038;RESAMP_METHOD=NEAREST_NEIGHBOR&#038;BANDS_SELECTED=&#038;FORMAT=JPEG&#038;LONBOX=32&#038;LATBOX=32&#038;GRIDLINE_FREQUENCY=none&#038;STRETCH=AUTO&#038;LAT=-4&#038;LON=75&#038;LINE=512&#038;SAMP=512 view] shows it has no ray system and thus is probably more than a billion years old. Damian&#8217;s oblique look from Earth nicely shows the slumped terraces and a significant scarp at the top of the eastern wall. This is probably another [http://www.lpod.org/?m=20060926 steep] place on the Moon.</p>
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[http://www.damianpeach.com/lunar.htm Damian&#8217;s website]<br />
 
[http://www.damianpeach.com/lunar.htm Damian&#8217;s website]<br />
 
[http://www.lpi.usra.edu/resources/lunar_orbiter/bin/info.shtml?522 A regional view]</p>
 
[http://www.lpi.usra.edu/resources/lunar_orbiter/bin/info.shtml?522 A regional view]</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 18:43, 4 January 2015

A Previously Unimaged Crater

laperouse.jpg
image by Damian Peach

Maybe it has been imaged before - as the center of attention, not in a broad field of view - but I’ve never seen the photo. La Perouse is one of a relatively large number of limb craters that are not often observed and are even harder to identify. La Perouse is limbward of Langrenus in a seldom seen area. At 77 km in diameter it is typical complex crater with terraces, central peak and relatively flat foor. It is a larger version of Kapteyn, another rarely identified crater at bottom left. La Perouse is a fairly fresh crater - although it does have a later impact on its floor - but the Clementine high Sun view shows it has no ray system and thus is probably more than a billion years old. Damian’s oblique look from Earth nicely shows the slumped terraces and a significant scarp at the top of the eastern wall. This is probably another steep place on the Moon.

Chuck Wood

Technical Details:
A few days ago…, 9.25″ Schmidt Cassegrain. Lumenera LU075M CCD camera. South up.
Related Links:
Rükl chart 49
Damian’s website
A regional view

COMMENTS?

Click on this icon File:PostIcon.jpg at the upper right to post a comment.

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