长征五号最新动态！美军曝「据报已经坠落」 即将重返大气层
▲ Space Track预测长征五号火箭路径。（图／翻摄自Twitter／@meithan42）
中国火箭「长征五号B遥二」（Long March 5B）上月底于海南岛升空，未料完成任务后偏离轨道，即将重返大气层，坠回地球表面。根据美国空军专业太空追踪网站「Space-Track.org」，长征五号将于台湾时间上午10时左右重新进入大气层。该网站稍早在推特转推最新消息指出，有迹象显示火箭已经坠落，正在等待经证实的消息。
Spoke with the team. We have indications the is down. Once they get radar confirmation of nothing in orbit (after 0300UTC) they will release the final message with time. Y’all can stop hiding in your bunkers. @SpaceTrackOrg
Latest TIP (as of 2021-05-09 0000Z) for CZ-5B (#LongMarch5B) (48275 / 2021-035B) shows projected re-entry at 2021-05-09 0211(UTC) +/- 60 minutes at latitude 35.9, longitude 24.4 (Mediterranean Basin)At 7.8 km/s, just 1 minute diff in the time of reentry =470 km diff in final loc
Space-Track.org预测指出，长征五号重新进入大气层的时间约会是台湾时间9日上午10时11分，正负误差60分钟。美国联邦政府出资的非营利航太公司Aerospace Corp最新预测则为台湾时间上午11时2分，正负误差2小时。
The absence of new data sets could indicate #LongMarch5B reentered. This fits both our own latest prediction's uncertainty range and @SpaceTrackOrg predictions. Without confirmed video footage, a decay message or a new data set, we cannot yet confirm. We're still watching. https://t.co/F7Cvt1LvEq
Aerospace Corp稍早发文说明，一直没有新的数据曝光，可能代表长征五号已经重返大气层，与该公司及Space-Track的预测皆吻合，但目前未取得任何经过证实的影片或数据，正持续观察。
然而，天文专家麦克道威尔（Jonathan McDowell）稍早推文指出，火箭主体残骸截至台湾时间上午10时11分仍在轨道上，正飞越约旦上空。
Confirmed rocket was still in orbit at 0211 UTC only going over Jordan... https://t.co/ycSQ2yfXo9