Conjunction Event Detail

    ✅
    Very Low Risk
    Very low collision probability. Continue monitoring.
    8.850384E-7
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-10-17T19:10:43+0800
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    1 Object 1

    AOE ID 20868
    NORAD ID 20868
    Object Type DEBRIS
    Country
    CN CN
    ← VS →

    2 Object 2

    AOE ID 69405
    NORAD ID 69405
    Object Type PAYLOAD
    Country
    CN CN

    Conjunction Constraints

    Parameter CZ-4 DEB QIANFAN-187
    Time of Closest Approach 2026-10-18T06:17:30+0000
    Collision Probability (Pc) 8.850384E-7
    Conjunction Distance (km) 2.58 km
    Relative Speed (km/s) 4.936 km/s
    Conjunction Risk Parameters R (Radial): 2.575 | I (In-track): 0.151 | C (Cross-track): 0.012
    Collision Risk Index (CRI) 0.34
    X Position (km) 214.576 214.742
    Position Y (km) 2006.099 2006.908
    Position Z (km) 7156.414 7158.857
    Velocity X (km/s) 4.832 0.275
    Velocity Y (km/s) 5.171 7.042
    Velocity Z (km/s) -1.668 -1.978

    Orbital Parameters 国际轨道数据源

    Parameter CZ-4 DEB QIANFAN-187
    Semimajor Axis (a) 7343.664 km 7446.611 km
    Eccentricity (e) 0.016879 0.000247
    Inclination (i) 99.1311° 88.9901°
    RAAN 227.6915° 267.6326°
    Perigee Argument 250.2138° 85.9487°
    Mean Anomaly (M) 108.0747° 274.1947°
    Apogee 1089.483 km 1070.317 km
    Perigee 841.571 km 1066.631 km
    Orbit Epoch 2026-10-16T18:58:04+0000 2026-10-16T18:13:17+0000

    CZ-4 DEB & QIANFAN-187 Collision Probability (Pc) Trend

    CZ-4 DEB & QIANFAN-187 Collision Probability (Pc) TrendNot Available

    CZ-4 DEB & QIANFAN-187 Miss Distance (Miss Distance) Trend

    CZ-4 DEB & QIANFAN-187 Miss Distance (Miss Distance) TrendNot Available

    CZ-4 DEBMiss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    QIANFAN-187Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    CZ-4 DEBCollision Probability Trend

    Object 1 Probability TrendNot Available

    QIANFAN-187Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with CZ-4 DEB

    No nearby objects data