{"id":251,"date":"2006-05-07T22:15:00","date_gmt":"2006-05-07T22:15:00","guid":{"rendered":"http:\/\/perezmedia.net\/beltofvenus\/2006\/05\/07\/comet_73pschwas_4\/"},"modified":"2021-11-27T23:44:00","modified_gmt":"2021-11-27T23:44:00","slug":"comet_73pschwas_4","status":"publish","type":"post","link":"https:\/\/perezmedia.net\/beltofvenus\/2006\/05\/07\/comet_73pschwas_4\/","title":{"rendered":"73P\/Schwassmann-Wachmann 3-C and Messier 57 &#8211; May 7, 2006"},"content":{"rendered":"<p><a href=\"javascript:myVoid()\" onmouseover=\"rollover('img2006050701_120X')\" onmouseout=\"rollout('img2006050701_120X')\"><img decoding=\"async\" src=\"http:\/\/www.perezmedia.net\/beltofvenus\/archives\/images\/2006\/img2006050701_SW3C120X_A.jpg\" name=\"img2006050701_120X\" alt=\"Step 1\" border=\"1\" color=\"FFFFFF\"><\/a><br \/>\n<script type=\"text\/javascript\"><br \/>\n<!--\nsetrollover(\"http:\/\/www.perezmedia.net\/beltofvenus\/archives\/images\/2006\/img2006050701_SW3C120X_B.jpg\");\n\/\/--><br \/>\n<\/script><\/p>\n<p><a href=\"javascript:myVoid()\" onmouseover=\"rollover('img2006050701_75X')\" onmouseout=\"rollout('img2006050701_75X')\"><img decoding=\"async\" src=\"http:\/\/www.perezmedia.net\/beltofvenus\/archives\/images\/2006\/img2006050701_SW3C75X_A.jpg\" name=\"img2006050701_75X\" alt=\"Step 1\" border=\"1\" color=\"FFFFFF\"><\/a><br \/>\n<script type=\"text\/javascript\"><br \/>\n<!--\nsetrollover(\"http:\/\/www.perezmedia.net\/beltofvenus\/archives\/images\/2006\/img2006050701_SW3C75X_B.jpg\");\n\/\/--><br \/>\n<\/script><\/p>\n<p><i>Move mouse over images to see labels.<\/i><\/p>\n<p><b>Observation Notes<\/b><\/p>\n<p><img decoding=\"async\" src=\"http:\/\/www.perezmedia.net\/beltofvenus\/archives\/images\/2006\/img2006050701_SW3Cfinder.jpg\" align=\"right\" color=\"ffffff\" border=\"1\">This evening, 73P\/Schwassmann-Wachmann 3 C was due to brush past M57 by just 3.5 arc minutes at 03:00 UT (8 PM MST). Unfortunately, Lyra was just beginning to crest the horizon at 8 pm. I finally got a good look at it about 9:30 PM. The comet and planetary nebula both shared the 120X (24&#8242; wide) field of view. It was pretty amazing to see them together, but the comet was moving so fast that I couldn&#8217;t take time to just soak it in. I had to get moving on the sketches if I wanted to capture them together. Still, sketching the view was fascinating. Every time I looked up from the sketch sheet, the comet had moved noticeably. What a lively view!<\/p>\n<p>The first quarter moon and local light pollution really took a bite out of the comet&#8217;s diffuse outer edges and the fainter stars that were surely there. So the view wasn&#8217;t as aesthetically pleasing as it could have been. The faintest star I picked up at 120X was mag. 11.3. The comet&#8217;s tail appeared about 7&#8242; long with a coma diameter of about 1.5 arc minutes. That was significantly smaller than the 70&#8217;\/6&#8242; that I saw a week ago with no moon.<\/p>\n<p>The 75X view came in handy as the comet continued to sail away at 12 arc seconds per minute. In this view, the comet was a bit higher in the sky and the tail appeared more like 11 arc minutes in length with a coma 2 arc minutes in diameter. In both views, a yellow-orange star (TYC2643-823-1) burned to the northwest of the comet.<\/p>\n<p>After making the sketches, I worked on some astrophotography. Through-scope photography isn&#8217;t one of my strong points, but I went for it anyway. This shot represents a stack of about 12 30-second exposures, using barlow projection with my Canon Digital Rebel at ISO 1600. I can&#8217;t manage enough in-focus to do prime focus photography on my scope, so the shots aren&#8217;t wide enough to include M57, but oh well.<\/p>\n<p><a href=\"javascript:myVoid()\" onmouseover=\"rollover('img2006050701_4827')\" onmouseout=\"rollout('img2006050701_4827')\"><img decoding=\"async\" src=\"http:\/\/www.perezmedia.net\/beltofvenus\/archives\/images\/2006\/img2006050701_IMG_4827_A.jpg\" name=\"img2006050701_4827\" alt=\"Step 1\" border=\"1\" color=\"FFFFFF\"><\/a><br \/>\n<script type=\"text\/javascript\"><br \/>\n<!--\nsetrollover(\"http:\/\/www.perezmedia.net\/beltofvenus\/archives\/images\/2006\/img2006050701_IMG_4827_B.jpg\");\n\/\/--><br \/>\n<\/script><\/p>\n<p>I also went for some wide field piggyback shots that shot the smudge of SW3-C at the bottom of Lyra<br \/>\n<a href=\"http:\/\/www.perezmedia.net\/beltofvenus\/archives\/images\/2006\/img2006050701_IMG_4854_LG.jpg\"><img decoding=\"async\" src=\"http:\/\/www.perezmedia.net\/beltofvenus\/archives\/images\/2006\/img2006050701_IMG_4854_SM.jpg\" color=\"ffffff\" border=\"1\"><\/a><br \/>\n<i>Click image for larger version<\/i><\/p>\n<p><!-- br--><!-- br--><\/p>\n<p><b>Factoids<\/b><\/p>\n<p><a href=\"http:\/\/www.perezmedia.net\/beltofvenus\/archives\/000550.html\">See first observation.<\/a><\/p>\n<table width=\"470\" border=\"1\" cellspacing=\"0\" cellpadding-left=\"4\">\n<tbody>\n<tr>\n<td><b>Subject<\/b><\/td>\n<td>73P\/Schwassmann-Wachmann 3 &#8211; Component C and M57<\/td>\n<\/tr>\n<tr>\n<td><b>Classification<\/b><\/td>\n<td>Comet and Planetary Nebula<\/td>\n<\/tr>\n<tr>\n<td><b>Position* (J2000)<\/b><\/td>\n<td>Lyra<br \/>\nComponent C<br \/>\nMAY 8, 2006 04:35 UT &#8211; [RA: 18:54:56.8 \/ Dec: +33:03:19]<br \/>\n05:15 UT &#8211; [RA: 18:55:38.2 \/ Dec: +33:02:17]<\/td>\n<\/tr>\n<tr>\n<td><b>Size<\/b><\/td>\n<td>Component C: Coma: 2&#8242; \/ Tail: 10&#8242;<\/td>\n<\/tr>\n<tr>\n<td><b>Brightness*<\/b><\/td>\n<td>Component C: ~6.5<\/td>\n<\/tr>\n<tr>\n<td><b>Date\/Time<\/b><\/td>\n<td>May 7, 2006 &#8211; 09:35 &#8211; 10:15 PM MST<br \/>\n(May 8, 2006 &#8211; 04:35 &#8211; 05:15 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>32 mm, 25 mm, and 10 mm Sirius Pl\u00c3\u00b6ssl (37.5X, 48X, 120X), and all 3 EPs plus + 2X Barlow (75X, 96X, 240X)<\/td>\n<\/tr>\n<tr>\n<td><b>Conditions<\/b><\/td>\n<td>Clear, breezy, 1st Qtr Moon<\/td>\n<\/tr>\n<tr>\n<td><b>Seeing<\/b><\/td>\n<td>3\/10 Pickering<\/td>\n<\/tr>\n<tr>\n<td><b>Transparency<\/b><\/td>\n<td>Mag 5.4 NELM<\/td>\n<\/tr>\n<tr>\n<td><b>*Sources<\/b><\/td>\n<td>Starry Night Pro Plus 5;<a href=\"http:\/\/www.aerith.net\/comet\/catalog\/0073P\/2006.html\" target=\"_blank\" rel=\"noopener\">Aerith.net<\/a><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"excerpt":{"rendered":"<p>73P\/Schwassmann-Wachmann 3 20060507<\/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":[10,16,62,45,42,63,71,15],"tags":[],"class_list":["post-251","post","type-post","status-publish","format-standard","hentry","category-comet","category-deep-sky","category-planetary-nebula","category-sg-comet","category-sg-nebula","category-sg-planetary-nebula","category-sgc-lyra","category-sketch-gallery"],"jetpack_featured_media_url":"","jetpack-related-posts":[{"id":242,"url":"https:\/\/perezmedia.net\/beltofvenus\/2006\/04\/05\/73pschwassmannw\/","url_meta":{"origin":251,"position":0},"title":"73P\/Schwassmann-Wachmann 3 &#8211; 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