Conjunction Event Detail

    Low Risk
    Low collision probability. Continue monitoring.
    1.260734E-6
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-09-20T17:24:39+0800
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    1 Object 1

    Name HJ-2F
    AOE ID 57519
    NORAD ID 57519
    Object Type PAYLOAD
    Country
    CN CN
    VS

    2 Object 2

    Name CO3D4
    AOE ID 64901
    NORAD ID 64901
    Object Type PAYLOAD
    Country
    FR FR

    Conjunction Constraints

    Parameter HJ-2F CO3D4
    Time of Closest Approach 2026-09-20T10:01:45+0000
    Collision Probability (Pc) 1.260734E-6
    Conjunction Distance (km) 2.561 km
    Relative Speed (km/s) 9.04 km/s
    Conjunction Risk Parameters R (Radial): -0.521 | I (In-track): -2.015 | C (Cross-track): -1.491
    Collision Risk Index (CRI) 0.37
    X Position (km) 916.634 918.101
    Position Y (km) 621.989 619.955
    Position Z (km) -6800.917 -6801.432
    Velocity X (km/s) -0.302 7.105
    Velocity Y (km/s) -7.553 -2.582
    Velocity Z (km/s) -0.737 0.725

    Orbital Parameters 国际轨道数据源

    Parameter HJ-2F CO3D4
    Semimajor Axis (a) 6883.716 km 6883.369 km
    Eccentricity (e) 0.000742 0.000130
    Inclination (i) 97.3896° 97.4340°
    RAAN 266.8083° 340.2381°
    Perigee Argument 181.0264° 29.4091°
    Mean Anomaly (M) 179.0957° 330.7217°
    Apogee 510.686 km 506.127 km
    Perigee 500.472 km 504.337 km
    Orbit Epoch 2026-09-20T05:42:37+0000 2026-09-19T21:45:45+0000

    HJ-2F & CO3D4 Collision Probability (Pc) Trend

    HJ-2F & CO3D4 Collision Probability (Pc) TrendNot Available

    HJ-2F & CO3D4 Miss Distance (Miss Distance) Trend

    HJ-2F & CO3D4 Miss Distance (Miss Distance) TrendNot Available

    HJ-2FMiss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    CO3D4Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    HJ-2FCollision Probability Trend

    Object 1 Probability TrendNot Available

    CO3D4Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with HJ-2F

    No nearby objects data