NROL-9 (Misty 2)
美国空军 · Titan 404B · 4E 号发射工位 (SLC-4E)
任务简介
这颗卫星被怀疑是一颗隐蔽型光电侦察卫星。开发隐蔽成像情报（IMINT）能力的项目名称据称为“迷雾”。业余卫星观测者持续追踪该次发射中一颗运行在2700公里×3100公里、63.4°倾角轨道上的物体，但详细轨道分析显示其受到显著的太阳辐射压力摄动，面质比约为0.1平方米/千克，是有效载荷的10到20倍，更类似于碎片或诱饵。推测其直径不超过5到10米，质量仅几百千克。如果USA 144是迷雾-2，则其可能运行在700到800公里、准65°倾角的轨道上。这些轨道阻力较低，因此无需进行轨道维持机动。
原文
This satellite is suspected to be a stealthy electro-optical reconnaissance satellite. The program name for developing an stealth IMINT capability is reportedly "Misty". Hobbyist satellite observers continue to track an object from that launch in a 2700 km × 3100 km, 63.4° orbit, but detailed orbital analysis reveals significant solar radiation pressure perturbations, from an area to mass ratio of about 0.1 m2/kg, 10 to 20 times that of a payload, and more akin to debris or a decoy, can be deduced. It appears to be no more than 5 to 10 m across, and only a few hundred kilograms in mass. If USA 144 is Misty-2, then it is likely to be in a 700 to 800 km, quasi 65° orbit. These orbits are low-drag, so orbit maintenance manoeuvres are not required.
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