Conjunction Event Detail

    Low Risk
    Low collision probability. Continue monitoring.
    1.490503E-6
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-09-16T06:54:19+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 63940
    NORAD ID 63940
    Object Type PAYLOAD
    Country
    US US

    Conjunction Constraints

    Parameter YAOGAN 21 STARLINK-34021
    Time of Closest Approach 2026-09-17T20:06:33+0000
    Collision Probability (Pc) 1.490503E-6
    Conjunction Distance (km) 2.754 km
    Relative Speed (km/s) 14.646 km/s
    Conjunction Risk Parameters R (Radial): -1.827 | I (In-track): -0.581 | C (Cross-track): 1.977
    Collision Risk Index (CRI) 0.38
    X Position (km) 710.715 709.046
    Position Y (km) -3061.095 -3061.622
    Position Z (km) 6088.64 6086.514
    Velocity X (km/s) -3.491 6.56
    Velocity Y (km/s) 5.893 -3.115
    Velocity Z (km/s) 3.357 -2.327

    Orbital Parameters 国际轨道数据源

    Parameter YAOGAN 21 STARLINK-34021
    Semimajor Axis (a) 6861.809 km 6855.083 km
    Eccentricity (e) 0.000932 0.000316
    Inclination (i) 97.1397° 70.0001°
    RAAN 294.9207° 157.6396°
    Perigee Argument 124.2617° 270.9532°
    Mean Anomaly (M) 235.9507° 89.1281°
    Apogee 490.065 km 479.114 km
    Perigee 477.279 km 474.778 km
    Orbit Epoch 2026-09-15T12:48:01+0000 2026-09-14T03:44:52+0000

    YAOGAN 21 & STARLINK-34021 Collision Probability (Pc) Trend

    YAOGAN 21 & STARLINK-34021 Collision Probability (Pc) TrendNot Available

    YAOGAN 21 & STARLINK-34021 Miss Distance (Miss Distance) Trend

    YAOGAN 21 & STARLINK-34021 Miss Distance (Miss Distance) TrendNot Available

    YAOGAN 21Miss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    STARLINK-34021Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    YAOGAN 21Collision Probability Trend

    Object 1 Probability TrendNot Available

    STARLINK-34021Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with YAOGAN 21

    No nearby objects data