Difference between revisions of "May 3, 2004"

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=Bully for Bullialdus!=
 
=Bully for Bullialdus!=
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      <td><h2 align="left"><b>Bully for Bullialdus!</b></h2></td>
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      <td><h2 align="right">May 03, 2004</h2></td>
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  [LPOD-2004-05-03b.htm <IMG SRC="images/LPOD-2004-05-03.jpeg" alt="See Explanation or highest resolution version available." NAME="main_image" hspace="6" border="0">]
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      <td><div align="center"><span class="main_sm">Image Credit: [mailto:john@jsussenbach.nl John Sussenbach] (left) and [mailto:Bruno.DAVERSIN@lahague.com Bruno Daversin] (right) </span></div></td>
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  <table class="story" border="0" bgcolor="#FFFFFF" width="90%" cellpadding="10" align="center"><tr><td>
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  <p class="story" align="center"><b>Bully for Bullialdus!
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  <p class="story" align="left">Here are two good images of Bullialdus - which is best? Its  pretty clear that the resolution of the right image - taken with the 24" Ludiver telescope is excellent - perhaps 800 meters! Small craters are cleanly visible on the floor and outer ramparts - these could be counted to estimate Bullialdus' age in billions of years. And the image shows where wall terraces still stand and where they have collapsed toward the floor...and are the smooth parts of the floor impact melts or lava flows - good question!  This is a great picture, Bruno - thanks!  The photo to the left was acquired under lower lighting and covers a wider area. The relationships of the crater ejecta and the mare are well documented. In most places Bullialdus secondary craters and ejecta striations are clearly depicted cutting into the mare. But on the NW side of the crater the lava is smooth and uncut by ejecta. Bullialdus presents no evidence of being an oblique impact so its ejecta must have once been there. We have to conclude that the patch of lava NW of Bullialdus is younger than the crater. This is a nice deduction of stratigraphic history allowed by this image's combination of wide view,  good resolution and low lighting (showing where secondaries are and aren't). This is a great picture, John - thanks!<p class"story"><b>Related Links:</b><br>[http://www.jsussenbach.nl/  Sussenbach's Digital Astroimaging site]</p><p class"story">[http://www.ludiver.com/conquerir_espace_scientifique_lune.php  Ludiver Observatory]</p><p class"story">[http://www.lpi.usra.edu/research/lunar_orbiter/images/img/iv_125_h2.jpg  Bullialdus North Rim on LO IV]</p><p class"story"><b>Technical Details:</b><br>
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    Left image (Sussenbach) 11 April 2003. C11, 2X Barlow and Toucam Pro
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  Right image (Daversin)  Ludiver Planetarium and Observatory: 24" cassegrain, f/D=16.
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  </p>
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  <p class"story"><b>Tomorrow's LPOD:</b> Inside Nectaris</p>
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      <td><p align="center" class="main_titles"><b>Author & Editor:</b><br>
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          [mailto:chuck@observingthesky.org Charles A. Wood]</p>
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        <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>[mailto:webmaster@entropysponge.com Contact Webmaster]</b></p>
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        <p align="center" class="main_titles"><b>A service of:</b><br>
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            <a class="one" href="http://www.observingthesky.org/">ObservingTheSky.Org</a></p>
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  <!-- end cal -->
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  <div align="center"><br>
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      <span class="main_titles"><b>Visit these other PODs:</b> <br>
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  <a class="one" href="http://antwrp.gsfc.nasa.gov/apod/astropix.html">Astronomy</a> | <a class="one" href="http://www.msss.com/">Mars</a> | <a class="one" href="http://epod.usra.edu/">Earth</a></span></div></td>
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  </table>
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<p>&nbsp;</p>
  
  

Revision as of 15:38, 4 January 2015

Bully for Bullialdus!

Bully for Bullialdus!

May 03, 2004

 
 [LPOD-2004-05-03b.htm <IMG SRC="images/LPOD-2004-05-03.jpeg" alt="See Explanation or highest resolution version available." NAME="main_image" hspace="6" border="0">]
Image Credit: John Sussenbach (left) and Bruno Daversin (right)

Bully for Bullialdus!

Here are two good images of Bullialdus - which is best? Its pretty clear that the resolution of the right image - taken with the 24" Ludiver telescope is excellent - perhaps 800 meters! Small craters are cleanly visible on the floor and outer ramparts - these could be counted to estimate Bullialdus' age in billions of years. And the image shows where wall terraces still stand and where they have collapsed toward the floor...and are the smooth parts of the floor impact melts or lava flows - good question! This is a great picture, Bruno - thanks! The photo to the left was acquired under lower lighting and covers a wider area. The relationships of the crater ejecta and the mare are well documented. In most places Bullialdus secondary craters and ejecta striations are clearly depicted cutting into the mare. But on the NW side of the crater the lava is smooth and uncut by ejecta. Bullialdus presents no evidence of being an oblique impact so its ejecta must have once been there. We have to conclude that the patch of lava NW of Bullialdus is younger than the crater. This is a nice deduction of stratigraphic history allowed by this image's combination of wide view, good resolution and low lighting (showing where secondaries are and aren't). This is a great picture, John - thanks!

Related Links:
Sussenbach's Digital Astroimaging site

Ludiver Observatory

Bullialdus North Rim on LO IV

Technical Details:

   Left image (Sussenbach) 11 April 2003. C11, 2X Barlow and Toucam Pro
 Right image (Daversin)  Ludiver Planetarium and Observatory: 24" cassegrain, f/D=16.

Tomorrow's LPOD: Inside Nectaris

Author & Editor:
Charles A. Wood

Technical Consultant:
Anthony Ayiomamitis

Contact Webmaster

A service of:
<a class="one" href="http://www.observingthesky.org/">ObservingTheSky.Org</a>

 

     Visit these other PODs:
<a class="one" href="http://antwrp.gsfc.nasa.gov/apod/astropix.html">Astronomy</a> | <a class="one" href="http://www.msss.com/">Mars</a> | <a class="one" href="http://epod.usra.edu/">Earth</a>

 


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