{"id":19320,"date":"2016-07-11T22:10:57","date_gmt":"2016-07-11T14:10:57","guid":{"rendered":"https:\/\/wp-productionenv-bjg9h2g2bgg5b8aa.southeastasia-01.azurewebsites.net\/news\/astronomers-say-theyve-spotted-a-dwarf-planet-thats-farther-out-than-pluto\/"},"modified":"2016-07-11T22:10:57","modified_gmt":"2016-07-11T14:10:57","slug":"astronomers-say-theyve-spotted-a-dwarf-planet-thats-farther-out-than-pluto","status":"publish","type":"post","link":"https:\/\/starpath.global\/news\/astronomers-say-theyve-spotted-a-dwarf-planet-thats-farther-out-than-pluto\/","title":{"rendered":"Astronomers say they\u2019ve spotted a dwarf planet that\u2019s farther out than Pluto"},"content":{"rendered":"
\"Image:
The golden ellipse indicates the orbit of the newly confirmed object 2015 RR245. Click on the image for a larger version. (Credit: Alex Parker \/ OSSOS Team)<\/figcaption><\/figure>\n

Astronomers have found an icy world that ranges far beyond the orbit of Neptune and may well rank as a dwarf planet alongside Pluto.<\/p>\n

The newly detected object, designated 2015 RR245, is thought to be less than a third the width of Pluto (435 miles vs. 1,474 miles), but its orbit is more eccentric. Its distance from the sun ranges from about 34 to more than 120 astronomical units, where each AU equals the distance between Earth and the sun. In comparison, Pluto\u2019s orbit has a range of 30 to 50 AU.<\/p>\n

Right now, 2015 RR245 is 80 AU from the sun and closing in, based on observations from the Canada-France-Hawaii Telescope on Hawaii\u2019s big island. It should reach the nearest point in its 733-year orbit in the year 2096.<\/p>\n

\u201cThe icy worlds beyond Neptune trace how the giant planets formed and then moved out from the sun. They let us piece together the history of our solar system. But almost all of these icy worlds are painfully small and faint: It\u2019s really exciting to find one that\u2019s large and bright enough that we can study it in detail,\u201d Michele Bannister, an astronomer at the University of Victoria in British Columbia, said in a statement.<\/p>\n

\"2015
This animated image shows 2015 RR245\u2019s slow motion across the sky over the course of three hours. (Credit: OSSOS Team)<\/figcaption><\/figure>\n

JJ Kavelars of the National Research Council of Canada first sighted 2015 RR245 in February, in a series of images that were taken for the Outer Solar Systems Origins Survey last September. The discovery was reported Sunday in a Minor Planet Electronic Circular.<\/p>\n

Astronomers don\u2019t yet know the dimensions of 2015 RR245 precisely. The diameter estimate of 435 miles is based on the brightness of the object. \u201cIt\u2019s either small and shiny, or large and dull,\u201d Bannister said. She told GeekWire that observations made during a future stellar occultation could tell the tale.<\/p>\n

2015 RR245 is passing through the Kuiper Belt, a band of icy objects that lie beyond Neptune at a distance of 30 to 50 AU from the sun. The researchers say it could qualify as a dwarf planet \u2013 that is, an object massive enough to crush itself into a round shape through self-gravity.<\/p>\n

The International Astronomical Union has recognized five dwarf planets so far: Eris, Pluto, Makemake, Haumea and Ceres. Astronomers assume there are more dwarfs out there, potentially including recently discovered icy worlds such as Sedna, Quaoar, 2012 VP113 (also known as Planet Biden) and 2007 OR10 (which made a splash in May).<\/p>\n

Bannister stirred up some buzz in March when she presented data about a different object in the far reaches of the solar system, known as uo3L91. At the time, Caltech astronomer Mike Brown \u2013 who was part of a team that discovered Eris back in 2005 \u2013 said the object\u2019s far-flung orbit could serve as evidence for the existence of a super-distant super-Earth he dubbed \u201cPlanet Nine.\u201d However, Bannister said 2015 RR245 has no connection to the case of uo3L91 or the search for Planet Nine.<\/p>\n","protected":false},"excerpt":{"rendered":"

The golden ellipse indicates the orbit of the newly confirmed object 2015 RR245. Click on the image for a larger version. (Credit: Alex Parker \/ OSSOS Team) Astronomers have found an icy world that ranges far beyond the orbit of Neptune and may well rank as a dwarf planet alongside Pluto. The newly detected object, designated […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":"","_links_to":"","_links_to_target":""},"categories":[2],"tags":[5537,2840,4709],"class_list":["post-19320","post","type-post","status-publish","format-standard","hentry","category-news","tag-2015-rr245","tag-dwarf-planets","tag-planets"],"acf":[],"_links":{"self":[{"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/posts\/19320"}],"collection":[{"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/comments?post=19320"}],"version-history":[{"count":0,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/posts\/19320\/revisions"}],"wp:attachment":[{"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/media?parent=19320"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/categories?post=19320"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/tags?post=19320"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}