{"id":7961,"date":"2013-03-03T12:00:51","date_gmt":"2013-03-03T22:00:51","guid":{"rendered":"http:\/\/darkerview.com\/wordpress\/?p=7961"},"modified":"2013-03-03T19:48:23","modified_gmt":"2013-03-04T05:48:23","slug":"comet-c2011-l4-panstarrs","status":"publish","type":"post","link":"https:\/\/darkerview.com\/wordpress\/?p=7961","title":{"rendered":"Comet C\/2011 L4 Pan-STARRS"},"content":{"rendered":"<p>Like so many other amateur astronomers, I am eagerly awaiting the appearance of Comet C\/2011 L4 Pan-STARRS.<\/p>\n<p>The comet was discovered in June of 2011, by the <a href=\"http:\/\/pan-starrs.ifa.hawaii.edu\/public\/home.html\" target=\"_blank\">Pan-STARRS survey telescope<\/a> atop Haleakala, Maui.  The comet will pass closest to earth on March 5th, at a distance of 1.09 <a href=\"http:\/\/en.wikipedia.org\/wiki\/Astronomical_unit\" target=\"_blank\">au<\/a>. Perihelion, the comet&#8217;s closest approach to the Sun, occurs early on March 10th UT.<\/p>\n<p><figure id=\"attachment_8000\" aria-describedby=\"caption-attachment-8000\" style=\"width: 150px\" class=\"wp-caption alignright\"><a href=\"https:\/\/darkerview.com\/wordpress\/?attachment_id=8000\" rel=\"attachment wp-att-8000\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/darkerview.com\/wordpress\/wp-content\/uploads\/2013\/03\/Comet2011L4Perihelion-150x150.png\" alt=\"Comet 2011 L4 Perihelion\" width=\"150\" height=\"150\" class=\"size-thumbnail wp-image-8000\" \/><\/a><figcaption id=\"caption-attachment-8000\" class=\"wp-caption-text\">C\/2011 L4 (PanSTARRS) positions in the sunset as it passes through perihelion, chart for march 10th<\/figcaption><\/figure>For northern hemisphere observers the comet is still quite low, just rising out of the Sun&#8217;s glare.  Over the next week it will rise above the sunset, and will be 12&deg; above the horizon at sunset on Saturday, March 9th.<\/p>\n<p>Initial predictions were quite optimistic with this comet, indicating a possible -1 magnitude for the comet.  Reality seems to be somewhat more restrained, with a peak somewhere between magnitude one and two being more likely.  Reports indicate that the comet has <a href=\"http:\/\/www.aerith.net\/comet\/catalog\/2011L4\/2011L4.html\" target=\"_blank\">brightened to about 2nd magnitude<\/a>, bright enough to be easily seen without optical aid.<\/p>\n<p>Even more convenient, the comet will be well placed for observation this coming weekend.  With new moon occurring on March 11th, this will be the prime weekend for a telescope outing. Amateur astronomers everywhere are already planing for this weekend.  Our local club is no exception, expect a good crowd of telescopes to be at the Mauna Kea VIS this weekend.  Myself?  I will probably setup at the <a href=\" https:\/\/darkerview.com\/wordpress\/?p=7990\" target=\"_blank\">Substation site<\/a>, just across the road from the VIS.  The site offers a much better western horizon, which is blocked from the VIS by a line of pu&#8217;u, old cinder cones.<\/p>\n<p>I will be taking photo gear, looking to get a decent photo of the comet.  Stay tuned to Darker View to see the results if I meet with any success.<\/p>\n<blockquote>\n<pre>C\/2011 L4 (PANSTARRS)\r\nEpoch 2013 Apr. 18.0 TT = JDT 2456400.5\r\nT 2013 Mar. 10.1696 TT                                  MPC\r\nq   0.301542             (2000.0)            P               Q\r\nz  -0.000093       Peri.  333.6517      +0.4100668      +0.1004726\r\n +\/-0.000000       Node    65.6658      +0.9078310      +0.0505875\r\ne   1.000028       Incl.   84.2072      -0.0876819      +0.9936529\r\nFrom 1372 observations 2011 May 21-2013 Feb. 21, mean residual 0\".4.<\/pre>\n<p>The <a href=\"http:\/\/scully.cfa.harvard.edu\/cgi-bin\/returnprepeph.cgi?d=c&#038;o=CK11L040\" target=\"_blank\">latest orbital elements<\/a> from the <a href=\"http:\/\/www.minorplanetcenter.net\/\" target=\"_blank\">MPC<\/a><\/p><\/blockquote>\n<p>Another interesting opportunity will come on March 12th, when a slim crescent Moon will join the comet in the sky.  A 1.4 day old moon, about 2% illuminated will be about 4&deg; north (to the right) of the comet.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Like so many other amateur astronomers, I am eagerly awaiting the appearance of Comet C\/2011 L4 Pan-STARRS. The comet was discovered in June of 2011, by the Pan-STARRS survey telescope atop Haleakala, Maui. The comet will pass closest to earth on March 5th, at a distance of 1.09 au. Perihelion, the comet&#8217;s closest approach to &hellip; <a href=\"https:\/\/darkerview.com\/wordpress\/?p=7961\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &#8220;Comet C\/2011 L4 Pan-STARRS&#8221;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[15,331],"tags":[875,337,874],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/darkerview.com\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/7961"}],"collection":[{"href":"https:\/\/darkerview.com\/wordpress\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/darkerview.com\/wordpress\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/darkerview.com\/wordpress\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/darkerview.com\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=7961"}],"version-history":[{"count":0,"href":"https:\/\/darkerview.com\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/7961\/revisions"}],"wp:attachment":[{"href":"https:\/\/darkerview.com\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=7961"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/darkerview.com\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=7961"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/darkerview.com\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=7961"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}