Conjunction Event Detail

    Medium Risk
    Monitor closely. Maneuver recommended for primary asset.
    1.116832E-5
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-09-04T21:20:31+0800
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    1 Object 1

    AOE ID 29507
    NORAD ID 29507
    Object Type ROCKET BODY
    Country
    CN CN
    VS

    2 Object 2

    Name BRO-21
    AOE ID 69007
    NORAD ID 69007
    Object Type PAYLOAD
    Country
    FR FR

    Conjunction Constraints

    Parameter CZ-4B R/B BRO-21
    Time of Closest Approach 2026-09-06T13:55:10+0000
    Collision Probability (Pc) 1.116832E-5
    Conjunction Distance (km) 1.285 km
    Relative Speed (km/s) 14.479 km/s
    Conjunction Risk Parameters R (Radial): 1.271 | I (In-track): 0.058 | C (Cross-track): 0.182
    Collision Risk Index (CRI) 0.56
    X Position (km) 1900.749 1900.953
    Position Y (km) -2249.979 -2250.516
    Position Z (km) -6226.396 -6227.545
    Velocity X (km/s) 2.432 -5.97
    Velocity Y (km/s) -6.495 3.524
    Velocity Z (km/s) 3.115 -3.103

    Orbital Parameters 国际轨道数据源

    Parameter CZ-4B R/B BRO-21
    Semimajor Axis (a) 6889.014 km 6878.428 km
    Eccentricity (e) 0.003244 0.000917
    Inclination (i) 97.5387° 97.3921°
    RAAN 291.4493° 142.8419°
    Perigee Argument 11.2936° 133.1305°
    Mean Anomaly (M) 348.9018° 227.0699°
    Apogee 533.225 km 506.596 km
    Perigee 488.529 km 493.986 km
    Orbit Epoch 2026-09-04T02:06:13+0000 2026-09-03T05:56:30+0000

    CZ-4B R/B & BRO-21 Collision Probability (Pc) Trend

    CZ-4B R/B & BRO-21 Collision Probability (Pc) TrendNot Available

    CZ-4B R/B & BRO-21 Miss Distance (Miss Distance) Trend

    CZ-4B R/B & BRO-21 Miss Distance (Miss Distance) TrendNot Available

    CZ-4B R/BMiss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    BRO-21Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    CZ-4B R/BCollision Probability Trend

    Object 1 Probability TrendNot Available

    BRO-21Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with CZ-4B R/B

    No nearby objects data