{"rewrite":{"id":"r_9d18d0abedb1029ca6614742","clusterId":"c_d36c386a8bc9f7dc92614450","slug":"bull-confirms-horn-l-reentered-atmosphere-76-days-after-h3-launch","model":"deepseek-v4-flash","headline":"BULL Confirms HORN-L Reentered Atmosphere 76 Days After H3 Launch","summary":"BULL reported that HORN-L, the demonstration unit of its HORN post-mission disposal device, launched on H3 Rocket No. 6 on June 12, 2026, reentered Earth's atmosphere on August 27, 2026 (UTC), about two and a half months after launch. On August 23, 2026, four days before reentry, the company captured orbital imaging showing the fan-shaped membrane still deployed.","whyItMatters":"BULL verified the full sequence, from launch to atmospheric reentry, of a membrane-deployment-type disposal device using both orbital data and images, the package a PMD device needs to be judged against a comparison satellite that held its altitude.","webCardHtml":"\u003cp\u003eThe last orbital data before reentry, from August 26 (UTC), put HORN-L at a semi-major axis altitude of roughly 316 km and a perigee altitude of about 288 km. The comparison satellite VERTECS held near its initial altitude of about 560 km, while HORN-L lost altitude from the moment its membrane deployed, with drag rising as the orbit dropped.\u003c/p\u003e\u003cp\u003eThe imaging on August 23 came from a satellite operated by HEO, which provides orbital imaging services. From that image, taken at an apogee of about 406 km and a perigee of about 384 km, BULL confirmed the fan-shaped membrane kept its designed deployment without rupture or major deformation. HEO\u0026#39;s analysis also assessed the boom as deployed from the satellite bus.\u003c/p\u003e","blueskyPost":"BULL says HORN-L, its HORN debris-disposal demonstration unit, reentered the atmosphere on August 27, 2026 (UTC), about 76 days after its H3 launch. Orbital imaging four days earlier showed the membrane still deployed as designed.","twitterPost":"BULL confirmed HORN-L reentered on August 27, 2026 (UTC), roughly 76 days after launch on H3 Rocket No. 6. While VERTECS held near 560 km, HORN-L kept losing altitude. Imaging four days before reentry showed the membrane still deployed.","threadsPost":null,"newsletterBlurb":"BULL confirmed that HORN-L, the demonstration unit of its HORN post-mission disposal device, reentered the atmosphere on August 27, 2026 (UTC), about two and a half months after launching on H3 Rocket No. 6. Orbital data showed continued descent while the comparison satellite VERTECS held near its initial altitude. Imaging taken four days before reentry showed the fan-shaped membrane intact and deployed.","attributionJson":"[{\"source\":\"ASCII.jp\",\"url\":\"https://ascii.jp/elem/000/004/434/4434215/?rss\",\"title\":\"BULL Confirms Atmospheric Reentry of HORN-L, Demonstration Unit of Space Debris Prevention Device \\\"HORN\\\"\"}]","lintFlagsJson":null,"lintHits":0,"costUsd":0,"inputTokens":4645,"outputTokens":668,"status":"published","repairAttempts":0,"nextRepairAt":null,"factsAttemptedAt":1789105486,"createdAt":"2026-09-11T05:40:41.000Z","publishedAt":"2026-09-11T05:43:27.000Z","updatedAt":"2026-09-11T05:43:27.000Z"},"cluster":{"id":"c_d36c386a8bc9f7dc92614450","canonicalTitle":"株式会社BULL、宇宙デブリ化防止装置「HORN」実証機「HORN-L」の大気圏再突入を確認","representativeArticleId":"a_d601f546b04b8639f430f236","sourceCount":1,"writtenSourceCount":1,"writeAttempts":0,"isSolo":true,"entitiesJson":"{\"anime_titles\":[],\"manga_titles\":[],\"work_titles\":[\"HORN\",\"HORN-L\"],\"studios\":[\"BULL\"],\"people\":[],\"type\":\"news\",\"domain\":\"other\",\"is_roundup\":false}","contentType":"news","status":"published","firstSeenAt":"2026-09-11T04:00:00.000Z","lastSeenAt":"2026-09-11T04:00:00.000Z","updatedAt":"2026-09-11T05:43:21.000Z"},"attribution":[{"source":"ASCII.jp","url":"https://ascii.jp/elem/000/004/434/4434215/?rss","title":"株式会社BULL、宇宙デブリ化防止装置「HORN」実証機「HORN-L」の大気圏再突入を確認"}],"entities":{"anime_titles":[],"manga_titles":[],"work_titles":["HORN","HORN-L"],"studios":["BULL"],"people":[],"type":"news","domain":"other","is_roundup":false},"keyFacts":null}