{"id":166,"date":"2005-08-27T03:00:00","date_gmt":"2005-08-27T03:00:00","guid":{"rendered":"http:\/\/perezmedia.net\/beltofvenus\/2005\/08\/27\/clavius_crater\/"},"modified":"2021-11-27T23:04:09","modified_gmt":"2021-11-27T23:04:09","slug":"clavius_crater","status":"publish","type":"post","link":"https:\/\/perezmedia.net\/beltofvenus\/2005\/08\/27\/clavius_crater\/","title":{"rendered":"Clavius Crater and Craterlets"},"content":{"rendered":"<p><a href=\"javascript:myVoid()\" onmouseover=\"rollover('img2005082703')\" onmouseout=\"rollout('img2005082703')\"><img decoding=\"async\" src=\"http:\/\/www.perezmedia.net\/beltofvenus\/archives\/images\/2005\/img2005082703clavius_A.jpg\" name=\"img2005082703\" alt=\"Step 1\" border=\"1\" color=\"FFFFFF\"><\/a><br \/>\n<script type=\"text\/javascript\"><br \/>\n<!--\nsetrollover(\"http:\/\/www.perezmedia.net\/beltofvenus\/archives\/images\/2005\/img2005082703clavius_B.jpg\");\n\/\/--><br \/>\n<\/script><\/p>\n<p><i>Move mouse over image to view labels. Lettered craters are Clavius labels, unless otherwise noted.<\/i><\/p>\n<p><b>Observation Notes:<\/b><\/p>\n<p><img decoding=\"async\" src=\"images\/2005\/img2005082703_ClaviusFinder.jpg\" border=\"1\" color=\"ffffff\" align=\"right\">The craterlet pattern in this larger crater is amazing. The floor of Clavius was smooth overall and shaded nicely from light to dark in the setting sunlight. A number of ravines ran north from Rutherfurd crater. Crater Clavius CB sat astride what appeared to be a smooth mound or dome. Besides Rutherfurd and Porter Craters, I spotted at least 32 craters on the floor of Clavius. The smallest was just east of Clavius N that turned out to be 3 km (2 miles) in diameter. I should note that I sketched Clavius JA about 2 times larger than I should have. It was actually smaller than Clavius J&#8230;I noticed that as I worked on the sketch, but didn&#8217;t get around to correcting it.<\/p>\n<p>I had good success sketching this on gray 110# index paper. It blends very nicely. I tried using a white pencil to shade in the brightest regions of the crater rims, but it didn&#8217;t work well at all. So after scanning, I went back to those sections and used the dodge\/burn tool to lighten the white-pencil regions further to get the effect I was after. I think I&#8217;m really going to have to try the white on black sketching technique <a href=\"http:\/\/www.cloudynights.com\/ubbthreads\/showflat.php\/Cat\/0\/Number\/529066\/page\/1\/view\/collapsed\/sb\/5\/o\/all\/fpart\/1\" target=\"_blank\" rel=\"noopener\">demonstrated by Rich Handy.<\/a><\/p>\n<p>EDIT SEP 03, 2009: Note that I have corrected the spelling of &#8220;Rutherford&#8221; to &#8220;Rutherfurd&#8221;. The previous spelling was incorrect and is assigned to a crater on the far side of the moon. Apologies for the erroneous spelling. (jpp)<\/p>\n<p><b>Factoids:<\/b><\/p>\n<p>Clavius crater is the 3rd largest crater on the earth-facing side of the moon, and was originally formed very early in the history of the moon, during the Nectarian period about 4 billion years ago. It is most famous for its arc of craterlets that splay across its floor in order of descending size.<\/p>\n<table width=\"470\" border=\"1\" cellspacing=\"0\" cellpadding-left=\"4\">\n<tbody>\n<tr>\n<td><b>Subject<\/b><\/td>\n<td>Clavius Crater<\/td>\n<\/tr>\n<tr>\n<td><b>Classification<\/b><\/td>\n<td>Crater<\/td>\n<\/tr>\n<tr>\n<td><b>Position<\/b><\/td>\n<td>South Central<\/td>\n<\/tr>\n<tr>\n<td><b>Phase\/Age<\/b><\/td>\n<td>23 days old<\/td>\n<\/tr>\n<tr>\n<td><b>Size*<\/b><\/td>\n<td>225 km diameter, 3500 m deep<\/td>\n<\/tr>\n<tr>\n<td><b>Date\/Time<\/b><\/td>\n<td>August 27, 2005 &#8211; 3:00 AM (August 27, 2005 &#8211; 10:00 UT)<\/td>\n<\/tr>\n<tr>\n<td><b>Observing Loc.<\/b><\/td>\n<td>Flagstaff, AZ &#8211; Home<\/td>\n<\/tr>\n<tr>\n<td><b>Instrument<\/b><\/td>\n<td>Orion SVP 6LT Reflector (150 mm dia.\/1200 mm F\/L)<\/td>\n<\/tr>\n<tr>\n<td><b>Eyepieces\/Mag.<\/b><\/td>\n<td>10 mm + 2X Barlow (240X)<\/td>\n<\/tr>\n<tr>\n<td><b>Conditions<\/b><\/td>\n<td>Clear, calm, 47\u00b0F<\/td>\n<\/tr>\n<tr>\n<td><b>Seeing<\/b><\/td>\n<td>Ant. III<\/td>\n<\/tr>\n<tr>\n<td><b>Sources<\/b><\/td>\n<td><i>The Moon Observer&#8217;s Guide<\/i> By Peter Grego<br \/>\n<a href=\"http:\/\/en.wikipedia.org\/wiki\/Clavius_(crater)\" target=\"_blank\" rel=\"noopener\">Wickepedia<\/a><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>* Based on published data.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Clavius Crater and Craterlets<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[13,14,15],"tags":[],"class_list":["post-166","post","type-post","status-publish","format-standard","hentry","category-lunar","category-sg-lunar","category-sketch-gallery"],"jetpack_featured_media_url":"","jetpack-related-posts":[{"id":90,"url":"https:\/\/perezmedia.net\/beltofvenus\/2005\/01\/22\/shickard_and_le\/","url_meta":{"origin":166,"position":0},"title":"Schickard and Lehmann Craters","author":"jperez1690","date":"January 22, 2005","format":false,"excerpt":"Schickard and Lehmann Craters","rel":"","context":"In &quot;Lunar&quot;","block_context":{"text":"Lunar","link":"https:\/\/perezmedia.net\/beltofvenus\/category\/lunar\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":280,"url":"https:\/\/perezmedia.net\/beltofvenus\/2006\/09\/03\/schiller_and_ba\/","url_meta":{"origin":166,"position":1},"title":"Schiller and Bayer Craters","author":"jperez1690","date":"September 3, 2006","format":false,"excerpt":"Schiller and Bayer Craters","rel":"","context":"In &quot;Lunar&quot;","block_context":{"text":"Lunar","link":"https:\/\/perezmedia.net\/beltofvenus\/category\/lunar\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":50,"url":"https:\/\/perezmedia.net\/beltofvenus\/2004\/10\/24\/j_herschel_crat\/","url_meta":{"origin":166,"position":2},"title":"J. Herschel Crater","author":"jperez1690","date":"October 24, 2004","format":false,"excerpt":"J. Herschel","rel":"","context":"In &quot;Lunar&quot;","block_context":{"text":"Lunar","link":"https:\/\/perezmedia.net\/beltofvenus\/category\/lunar\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":56,"url":"https:\/\/perezmedia.net\/beltofvenus\/2004\/11\/19\/alphonsus_and_a\/","url_meta":{"origin":166,"position":3},"title":"Alphonsus and Arzachel Craters","author":"jperez1690","date":"November 19, 2004","format":false,"excerpt":"Alphonsus and Arzachel","rel":"","context":"In &quot;Lunar&quot;","block_context":{"text":"Lunar","link":"https:\/\/perezmedia.net\/beltofvenus\/category\/lunar\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":30,"url":"https:\/\/perezmedia.net\/beltofvenus\/2004\/09\/26\/grimaldi_lohrma\/","url_meta":{"origin":166,"position":4},"title":"Grimaldi, Lohrmann, Hevelius, and Cavalerius Craters","author":"jperez1690","date":"September 26, 2004","format":false,"excerpt":"Grimaldi Crater","rel":"","context":"In &quot;Lunar&quot;","block_context":{"text":"Lunar","link":"https:\/\/perezmedia.net\/beltofvenus\/category\/lunar\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":8,"url":"https:\/\/perezmedia.net\/beltofvenus\/2004\/08\/01\/lunar_sketches\/","url_meta":{"origin":166,"position":5},"title":"Lunar Sketches","author":"jperez1690","date":"August 1, 2004","format":false,"excerpt":"Lunar Sketches","rel":"","context":"In &quot;General&quot;","block_context":{"text":"General","link":"https:\/\/perezmedia.net\/beltofvenus\/category\/general\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]}],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/perezmedia.net\/beltofvenus\/wp-json\/wp\/v2\/posts\/166","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/perezmedia.net\/beltofvenus\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/perezmedia.net\/beltofvenus\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/perezmedia.net\/beltofvenus\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/perezmedia.net\/beltofvenus\/wp-json\/wp\/v2\/comments?post=166"}],"version-history":[{"count":1,"href":"https:\/\/perezmedia.net\/beltofvenus\/wp-json\/wp\/v2\/posts\/166\/revisions"}],"predecessor-version":[{"id":744,"href":"https:\/\/perezmedia.net\/beltofvenus\/wp-json\/wp\/v2\/posts\/166\/revisions\/744"}],"wp:attachment":[{"href":"https:\/\/perezmedia.net\/beltofvenus\/wp-json\/wp\/v2\/media?parent=166"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/perezmedia.net\/beltofvenus\/wp-json\/wp\/v2\/categories?post=166"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/perezmedia.net\/beltofvenus\/wp-json\/wp\/v2\/tags?post=166"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}