Conjunction Event Detail

    Low Risk
    Low collision probability. Continue monitoring.
    2.748938E-6
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-09-03T09:08:19+0800
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    1 Object 1

    AOE ID 39211
    NORAD ID 39211
    Object Type ROCKET BODY
    Country
    CN CN
    VS

    2 Object 2

    AOE ID 59489
    NORAD ID 59489
    Object Type PAYLOAD
    Country
    US US

    Conjunction Constraints

    Parameter CZ-4C R/B STARLINK-31638
    Time of Closest Approach 2026-09-03T01:09:46+0000
    Collision Probability (Pc) 2.748938E-6
    Conjunction Distance (km) 1.961 km
    Relative Speed (km/s) 12.832 km/s
    Conjunction Risk Parameters R (Radial): -0.931 | I (In-track): 0.917 | C (Cross-track): 1.462
    Collision Risk Index (CRI) 0.44
    X Position (km) 5097.715 5096.503
    Position Y (km) -952.532 -951.015
    Position Z (km) -4497.687 -4497.96
    Velocity X (km/s) -5.086 2.576
    Velocity Y (km/s) -0.466 7.024
    Velocity Z (km/s) -5.624 1.435

    Orbital Parameters 国际轨道数据源

    Parameter CZ-4C R/B STARLINK-31638
    Semimajor Axis (a) 6825.036 km 6861.200 km
    Eccentricity (e) 0.006252 0.000117
    Inclination (i) 97.9589° 43.0044°
    RAAN 175.5652° 64.5755°
    Perigee Argument 4.9482° 266.0946°
    Mean Anomaly (M) 355.2366° 93.9772°
    Apogee 489.572 km 483.870 km
    Perigee 404.226 km 482.256 km
    Orbit Epoch 2026-09-02T07:02:46+0000 2026-09-01T21:14:20+0000

    CZ-4C R/B & STARLINK-31638 Collision Probability (Pc) Trend

    CZ-4C R/B & STARLINK-31638 Collision Probability (Pc) TrendNot Available

    CZ-4C R/B & STARLINK-31638 Miss Distance (Miss Distance) Trend

    CZ-4C R/B & STARLINK-31638 Miss Distance (Miss Distance) TrendNot Available

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

    Object 1 Miss Distance TrendNot Available

    STARLINK-31638Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    CZ-4C R/BCollision Probability Trend

    Object 1 Probability TrendNot Available

    STARLINK-31638Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with CZ-4C R/B

    No nearby objects data