{"id":240,"date":"2026-07-28T16:28:08","date_gmt":"2026-07-28T21:28:08","guid":{"rendered":"https:\/\/thestarguru.com\/?p=240"},"modified":"2026-07-28T16:28:08","modified_gmt":"2026-07-28T21:28:08","slug":"koi-3617","status":"publish","type":"post","link":"https:\/\/thestarguru.com\/index.php\/2026\/07\/28\/koi-3617\/","title":{"rendered":"KOI-3617"},"content":{"rendered":"\n
\"\"
Artistic Representation of KOI-3617 b<\/mark><\/figcaption><\/figure>\n\n\n\n

KOI-3617 (also known as KIC 10735564) is a binary star system consisting of a blue-white main sequence star and a “stelloplanet.” KOI-3617 A is roughly twice the size of the sun, while KOI-3617 B is around the same size as our sun. The system is located in the constellation Cygnus, 10,886 light years away. KOI-3617 B was once thought to be the largest known planet, but it turned out to be a false positive and thus is no longer a planet. KOI-3617 B could be a brown dwarf or a star, but here it is classified as a stelloplanet, a sun-sized planet-like stellar object.<\/p>\n\n\n\n

Astronomical data<\/h2>\n\n\n\n

KOI-3617 A<\/strong><\/p>\n\n\n\n

Radius (in Solar Radii): 2.23 R<\/em>\u2609<\/sub><\/p>\n\n\n\n

Diameter (in Kilometers): 3,114,864 km<\/p>\n\n\n\n

Mass (in Solar Masses): 1.78 M<\/var>\u2609<\/sub><\/p>\n\n\n\n

Distance (in Light Years): 10,886 ly<\/p>\n\n\n\n

Spectral type: A (White)<\/p>\n\n\n\n

KOI-3617 B<\/strong><\/p>\n\n\n\n

Radius (in Solar Radii): 1.37 R<\/em>\u2609<\/sub><\/p>\n\n\n\n

Diameter (in Kilometers): 1,919,560 km<\/p>\n\n\n\n

Spectral type: Stelloplanet<\/p>\n\n\n\n

Gallery<\/h2>\n\n\n\n
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The Sun compared to the members of the KOI-3617 system<\/mark><\/figcaption><\/figure>\n\n\n\n

<\/p>\n","protected":false},"excerpt":{"rendered":"

KOI-3617 (also known as KIC 10735564) is a binary star system consisting of a blue-white main sequence star and a “stelloplanet.” KOI-3617 A is roughly twice the size of the sun, while KOI-3617 B is around the same size as our sun. The system is located in the constellation Cygnus, 10,886 light years away. KOI-3617 B was once thought to… Continue reading KOI-3617<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":242,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[9,7,39,50],"tags":[],"class_list":["post-240","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-main-sequence-stars","category-stars","category-stars-in-the-constellation-cygnus","category-stelloplanets","entry"],"_links":{"self":[{"href":"https:\/\/thestarguru.com\/index.php\/wp-json\/wp\/v2\/posts\/240","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/thestarguru.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/thestarguru.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/thestarguru.com\/index.php\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/thestarguru.com\/index.php\/wp-json\/wp\/v2\/comments?post=240"}],"version-history":[{"count":1,"href":"https:\/\/thestarguru.com\/index.php\/wp-json\/wp\/v2\/posts\/240\/revisions"}],"predecessor-version":[{"id":244,"href":"https:\/\/thestarguru.com\/index.php\/wp-json\/wp\/v2\/posts\/240\/revisions\/244"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/thestarguru.com\/index.php\/wp-json\/wp\/v2\/media\/242"}],"wp:attachment":[{"href":"https:\/\/thestarguru.com\/index.php\/wp-json\/wp\/v2\/media?parent=240"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/thestarguru.com\/index.php\/wp-json\/wp\/v2\/categories?post=240"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/thestarguru.com\/index.php\/wp-json\/wp\/v2\/tags?post=240"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}