  {"id":160712,"date":"2022-06-14T15:29:17","date_gmt":"2022-06-15T01:29:17","guid":{"rendered":"https:\/\/www.hawaii.edu\/news\/?p=160712"},"modified":"2022-06-14T15:29:17","modified_gmt":"2022-06-15T01:29:17","slug":"maunakea-telescopes-near-sun-comet-death","status":"publish","type":"post","link":"https:\/\/www.hawaii.edu\/news\/2022\/06\/14\/maunakea-telescopes-near-sun-comet-death\/","title":{"rendered":"Maunakea telescopes capture near-Sun comet roasting to death"},"content":{"rendered":"<span class=\"span-reading-time rt-reading-time\" style=\"display: block;\"><span class=\"rt-label rt-prefix\">Reading time: <\/span> <span class=\"rt-time\"> 2<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span><figure id=\"attachment_160697\" aria-describedby=\"caption-attachment-160697\" style=\"width: 676px\" class=\"wp-caption alignleft\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.hawaii.edu\/news\/wp-content\/uploads\/2022\/06\/manoa-ifa-near-sun-comet.jpg\" alt=\"comet\" width=\"676\" height=\"240\" class=\"size-full wp-image-160697\" srcset=\"https:\/\/www.hawaii.edu\/news\/wp-content\/uploads\/2022\/06\/manoa-ifa-near-sun-comet.jpg 676w, https:\/\/www.hawaii.edu\/news\/wp-content\/uploads\/2022\/06\/manoa-ifa-near-sun-comet-300x107.jpg 300w, https:\/\/www.hawaii.edu\/news\/wp-content\/uploads\/2022\/06\/manoa-ifa-near-sun-comet-130x46.jpg 130w\" sizes=\"auto, (max-width: 676px) 100vw, 676px\" \/><figcaption id=\"caption-attachment-160697\" class=\"wp-caption-text\">Subaru Telescope\/<abbr>CFHT<\/abbr>\/Man-To Hui<\/figcaption><\/figure>\n<p>Astronomers using world-leading telescopes, including several observatories on Maunakea and in space, have captured images of a periodic rocky near-Sun comet breaking apart. It marked the first time, <abbr>323P\/SOHO<\/abbr>, a known comet, was detected by a ground-based telescope  and was caught in the act of disintegrating, which could help explain the scarcity of the near-Sun population of periodic comets and asteroids.<\/p>\n<p>To better understand these bodies, a group of international researchers including <strong>Man-To Hui<\/strong>, a former University of <span aria-label=\"Hawaii\">Âé¶¹´«Ã½<\/span> <a href=\"http:\/\/www.ifa.hawaii.edu\/\">Institute for Astronomy<\/a> (<abbr>IfA<\/abbr>) researcher, and <abbr>IfA<\/abbr> Astronomer <strong>David Tholen<\/strong>, observed <abbr>323P\/SOHO<\/abbr> with multiple telescopes on Maunakea including the <a href=\"https:\/\/subarutelescope.org\/en\/\">Subaru Telescope<\/a>, <a href=\"https:\/\/www.cfht.hawaii.edu\/\">Canada-France-Hawaii-Telescope<\/a> (<abbr>CFHT<\/abbr>) and <a href=\"https:\/\/www.gemini.edu\/\">Gemini North<\/a>, and <a href=\"https:\/\/lowell.edu\/research\/telescopes-and-facilities\/ldt\/\">Lowell Discovery Telescope<\/a> in Arizona and <a href=\"https:\/\/hubblesite.org\/\">Hubble Space Telescope<\/a>.<\/p>\n<ul>\n<li><strong>Related <em><abbr>UH<\/abbr> News<\/em> story:<\/strong> <a href=\"https:\/\/www.hawaii.edu\/news\/2021\/08\/03\/meteor-outburst-captured-maunakea-telescope\/\">Rare meteor outburst captured by Maunakea telescope<\/a>, August 3, 2021<\/li>\n<\/ul>\n<p>Researchers found that <abbr>323P\/SOHO<\/abbr> had changed remarkably during its close passage by the Sun. They believe that the intense radiation from the Sun caused parts of the comet to break off due to thermal fracturing, similar to how ice cubes crack when you pour a hot drink over them. This mass loss mechanism could help explain what happens to the near-Sun population and why there are so few of them left. Astronomers also determined the comet\u2019s rapid rotation clocked in at just more than half an hour per revolution, and that its color is unlike anything else in the Solar System.<\/p>\n<p>&ldquo;Observations of other near-Sun objects are needed to see if they also share these traits,&rdquo; said Hui, who is now an assistant professor at Macau University of Science and Technology. &ldquo;We couldn\u2019t have made this discovery without observations from the telescopes on Maunakea, made possible by the University of <span aria-label=\"Hawaii\">Âé¶¹´«Ã½<\/span>. The observations from the Subaru Telescope were the initiator, shrinking orbit uncertainties and making follow-up observations possible. <abbr>CFHT<\/abbr> provided the best coverage data and Gemini provided the densest data points.&rdquo;<\/p>\n<p>Since these objects pass so close to the molten heart of the Solar System, they are difficult to spot and study. Most have been discovered by accident in solar telescope observations. According to Hui, the group didn\u2019t know exactly where to look because the orbit was poorly constrained. However the wide field of view from the Subaru allowed them to &ldquo;cast a wide net&rdquo; and find the comet as it approached the Sun. Using new data, researchers were able to reposition other telescopes when the comet started to move away from the Sun.<\/p>\n<p>&ldquo;We work very closely with our University of <span aria-label=\"Hawaii\">Âé¶¹´«Ã½<\/span> users, including David Tholen and Man-to Hui, to optimize their observations, quickly following up observations made at other facilities and using MEGACam to recover interesting objects like <abbr>323P\/SOHO<\/abbr>.&rdquo; said Todd Burdullis, Queued Service Observing operations specialist at <abbr>CFHT<\/abbr>. &ldquo;Working with <abbr>UH<\/abbr> astronomers studying the building blocks of our solar system never ceases to provide incredible discoveries.\u201d<\/p>\n<p>The study was published in the <em><a href=\"https:\/\/iopscience.iop.org\/article\/10.3847\/1538-3881\/ac6dcb\">Astronomical Journal<\/a><\/em>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The sighting could help explain the scarcity of the near-Sun population of periodic comets and asteroids.<\/p>\n","protected":false},"author":16,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[30],"tags":[34,35,1363,659,158,9],"class_list":["post-160712","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-research","tag-astronomy","tag-institute-for-astronomy","tag-manoa-research","tag-maunakea","tag-publication","tag-uh-manoa","entry","has-media"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.0.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"The sighting could help explain the scarcity of the near-Sun population of periodic comets and asteroids.\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"Âé¶¹´«Ã½News\"\/>\n\t<meta name=\"keywords\" content=\"maunakea,sun,comet,323p\/soho,asteroids,man to hui,university of hawaii,institute for 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