鵲橋2号

鵲橋2号
任務種別通信
運用者中華人民共和国の旗 中国国家航天局
COSPAR ID2024-051A
SATCAT №59274
任務期間8年から10年(計画)
9ヶ月, 5日 (実際)
特性
バスCAST-2000[1]
製造者中国空間技術研究院傘下
航天東方紅衛星有限公司
燃料無重量1,200キログラム (2,600 lb)
寸法アンテナ:直径4.2m[1]
消費電力1350W[1]
任務開始
打ち上げ日2024年3月20日0時31分28秒(UTC[2]
ロケット長征8号英語版遥3[2]
打上げ場所文昌衛星発射場 LC-201[2]
軌道特性
参照座標月周回長楕円凍結軌道英語版
近点高度200 km (120 mi)[3]
遠点高度16,000 km (9,900 mi)[3]
傾斜角62.4°[4]
軌道周期24時間[3]
オービター
軌道投入 2024年3月24日 17:05 UTC[5]
搭載機器
  • Grid-based Energetic Neutral Atom imager (GENA)
  • Extreme Ultraviolet Camera (EUC)
  • Lunar Orbit VLBI EXperiment (LOVEX)

鵲橋2号は、中華人民共和国の月探査プロジェクト「嫦娥計画」第4期において打ち上げられた月周回人工衛星である。先代の鵲橋とは異なり、月周回長楕円凍結軌道に投入された。地上と直接交信することが困難な月の裏側に送り込まれた中国の月探査機「嫦娥6号」と地球との間の通信を中継し、世界初となる月の裏側でのサンプルリターンミッションの成功に寄与した。名前は鵲橋(中国の伝説で旧暦の七夕の日に天の川に架かるとされる橋)に因む。

ミッションの経過

鵲橋2号は、2024年3月20日0時31分(UTC)に文昌衛星発射場から長征8号英語版によって打ち上げられた[6][7]。2024年に嫦娥4号嫦娥6号と地球との通信を中継し、その後は2026年と2028年にそれぞれ打ち上げが予定されている嫦娥7号及び8号の月面探査ミッションも支援する[8][9]

打ち上げ後、2024年3月24日16時46分(UTC)に月軌道[10]、4月2日には目標となる長楕円軌道に入った。その後6日に嫦娥4号との通信に成功、8日から9日にかけて地上にある嫦娥6号と通信テストを行い、成功した[11]

8年から10年間動作し、傾斜62.4°、200 km×16,000 kmの長楕円凍結軌道を使用することが期待されている[3]

出典

  1. ^ a b c Zhang, LiHua; Xiong, Liang; Sun, Ji; Gao, Shan; Wang, XiaoLei; Zhang, AiBing (2019-02-14). “Technical characteristics of the relay communication satellite "Queqiao" for Chang'e-4 lunar farside exploration mission” (Chinese). Scientia Sinica Technologica 49 (2): 138–146. doi:10.1360/N092018-00375. ISSN 2095-946X. 
  2. ^ a b c China launches Queqiao-2 relay satellite to support moon missions”. Spacenews.com (19 March 2024). 20 March 2024閲覧。
  3. ^ a b c d Lihua Zhang (2024年3月20日). “月亮之上"梦想绽放" 增强现实+AI生成技术揭秘鹊桥二号发射全程” (中国語). 央视网. 2024年3月23日閲覧。
  4. ^ 周文艳、高珊、刘德成、张相宇、马继楠、于登云 (2020). “月球极区探测轨道设计”. 深空探测学报 7 (3): 250. http://jdse.bit.edu.cn/fileSKTCXB/journal/article/sktcxb/2020/3/PDF/sktcxb-zhouwenyan.pdf. 
  5. ^ 鹊桥二号中继星成功实施近月制动 顺利进入环月轨道飞行” (中国語). 新华网 (2024年3月25日). 2024年3月25日閲覧。
  6. ^ China launches Queqiao-2 relay satellite to support moon missions”. Space.com. 20 March 2024閲覧。
  7. ^ 我国成功发射鹊桥二号中继星-新华网”. hq.news.cn. 2024年3月20日閲覧。
  8. ^ 探月工程四期中继星运抵海南文昌-新华网”. www.news.cn. 2024年3月20日閲覧。
  9. ^ 鹊桥二号中继星任务星箭组合体垂直转运至发射区-新华网”. www.news.cn. 2024年3月20日閲覧。
  10. ^ Jones, Andrew (2024年3月25日). “China’s Queqiao-2 relay satellite enters lunar orbit” (英語). SpaceNews. 2024年3月26日閲覧。
  11. ^ 中国月探査プロジェクトの中継衛星「鵲橋2号」、通信テスト完了”. 新華網日本語 (2024年4月13日). 2024年7月11日閲覧。

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