Conjunction Event Detail

    Low Risk
    Low collision probability. Continue monitoring.
    1.664146E-6
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-09-16T06:54:22+0800
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    1 Object 1

    AOE ID 40143
    NORAD ID 40143
    Object Type PAYLOAD
    Country
    CN CN
    VS

    2 Object 2

    AOE ID 57069
    NORAD ID 57069
    Object Type PAYLOAD
    Country
    US US

    Conjunction Constraints

    Parameter YAOGAN 21 STARLINK-5821
    Time of Closest Approach 2026-09-17T14:13:31+0000
    Collision Probability (Pc) 1.664146E-6
    Conjunction Distance (km) 2.536 km
    Relative Speed (km/s) 14.103 km/s
    Conjunction Risk Parameters R (Radial): 1.322 | I (In-track): 0.83 | C (Cross-track): 1.999
    Collision Risk Index (CRI) 0.39
    X Position (km) -3149.393 -3151.832
    Position Y (km) 5464.838 5465.329
    Position Z (km) 2688.63 2688.144
    Velocity X (km/s) -0.594 -4.343
    Velocity Y (km/s) 3.094 -4.605
    Velocity Z (km/s) -6.948 4.256

    Orbital Parameters 国际轨道数据源

    Parameter YAOGAN 21 STARLINK-5821
    Semimajor Axis (a) 6861.809 km 6861.194 km
    Eccentricity (e) 0.000932 0.000120
    Inclination (i) 97.1397° 43.0044°
    RAAN 294.9207° 103.8858°
    Perigee Argument 124.2617° 271.7411°
    Mean Anomaly (M) 235.9507° 88.3304°
    Apogee 490.065 km 483.882 km
    Perigee 477.279 km 482.232 km
    Orbit Epoch 2026-09-15T12:48:01+0000 2026-09-15T14:59:40+0000

    YAOGAN 21 & STARLINK-5821 Collision Probability (Pc) Trend

    YAOGAN 21 & STARLINK-5821 Collision Probability (Pc) TrendNot Available

    YAOGAN 21 & STARLINK-5821 Miss Distance (Miss Distance) Trend

    YAOGAN 21 & STARLINK-5821 Miss Distance (Miss Distance) TrendNot Available

    YAOGAN 21Miss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    STARLINK-5821Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    YAOGAN 21Collision Probability Trend

    Object 1 Probability TrendNot Available

    STARLINK-5821Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with YAOGAN 21

    No nearby objects data