Conjunction Event Detail

    Very Low Risk
    Very low collision probability. Continue monitoring.
    8.927611E-7
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-09-12T09:15:07+0800
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    1 Object 1

    AOE ID 53639
    NORAD ID 53639
    Object Type PAYLOAD
    Country
    US US
    VS

    2 Object 2

    AOE ID 59536
    NORAD ID 59536
    Object Type PAYLOAD
    Country
    US US

    Conjunction Constraints

    Parameter STARLINK-4422 STARLINK-31721
    Time of Closest Approach 2026-09-12T14:58:31+0000
    Collision Probability (Pc) 8.927611E-7
    Conjunction Distance (km) 2.814 km
    Relative Speed (km/s) 6.264 km/s
    Conjunction Risk Parameters R (Radial): 2.167 | I (In-track): 1.638 | C (Cross-track): 0.736
    Collision Risk Index (CRI) 0.34
    X Position (km) -2165.718 -2163.553
    Position Y (km) 4644.192 4643.698
    Position Z (km) 4556.983 4555.256
    Velocity X (km/s) -4.261 -7.206
    Velocity Y (km/s) -5.333 -2.213
    Velocity Z (km/s) 3.401 -1.163

    Orbital Parameters 国际轨道数据源

    Parameter STARLINK-4422 STARLINK-31721
    Semimajor Axis (a) 6864.171 km 6861.181 km
    Eccentricity (e) 0.000187 0.000110
    Inclination (i) 53.1914° 43.0024°
    RAAN 76.9208° 13.2050°
    Perigee Argument 49.3275° 265.7570°
    Mean Anomaly (M) 310.7887° 94.3156°
    Apogee 487.321 km 483.799 km
    Perigee 484.747 km 482.289 km
    Orbit Epoch 2026-09-11T19:52:31+0000 2026-09-11T14:59:17+0000

    STARLINK-4422 & STARLINK-31721 Collision Probability (Pc) Trend

    STARLINK-4422 & STARLINK-31721 Collision Probability (Pc) TrendNot Available

    STARLINK-4422 & STARLINK-31721 Miss Distance (Miss Distance) Trend

    STARLINK-4422 & STARLINK-31721 Miss Distance (Miss Distance) TrendNot Available

    STARLINK-4422Miss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    STARLINK-31721Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    STARLINK-4422Collision Probability Trend

    Object 1 Probability TrendNot Available

    STARLINK-31721Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with STARLINK-4422

    No nearby objects data