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| 轨道参数 | COSMOS 991 | FENGYUN 1C DEB |
|---|---|---|
| 半长轴 (a) | 7354.189 km | 7313.024 km |
| 偏心率 (e) | 0.003767 | 0.012129 |
| 轨道倾角 (i) | 82.9915° | 99.0129° |
| 升交点赤经 (RAAN) | 183.5003° | 359.1249° |
| 近地点幅角(ω) | 50.2399° | 167.0709° |
| 平近点角 (M) | 7.0413° | 222.7259° |
| 远地点高度(Apogee) | 1003.758 km | 1023.588 km |
| 近地点高度(Perigee) | 948.346 km | 846.186 km |
| 轨道历元 (Epoch) | 2026-09-10T18:58:43+0000 | 2026-09-09T05:49:24+0000 |
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