Conjunction Event Detail

    Very Low Risk
    Very low collision probability. Continue monitoring.
    9.869164E-7
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-09-03T06:38:42+0800
    View CDM
    Download CDM 1.0

    1 Object 1

    AOE ID 28415
    NORAD ID 28415
    Object Type ROCKET BODY
    Country
    CN CN
    VS

    2 Object 2

    AOE ID 59798
    NORAD ID 59798
    Object Type PAYLOAD
    Country
    US US

    Conjunction Constraints

    Parameter CZ-4B R/B STARLINK-31687
    Time of Closest Approach 2026-09-03T03:08:24+0000
    Collision Probability (Pc) 9.869164E-7
    Conjunction Distance (km) 2.738 km
    Relative Speed (km/s) 7.025 km/s
    Conjunction Risk Parameters R (Radial): -0.523 | I (In-track): -2.384 | C (Cross-track): 1.237
    Collision Risk Index (CRI) 0.35
    X Position (km) -1100.001 -1101.046
    Position Y (km) 6714.82 6715.499
    Position Z (km) 870.259 867.822
    Velocity X (km/s) 0.807 -5.653
    Velocity Y (km/s) 1.135 -0.261
    Velocity Z (km/s) -7.492 -5.112

    Orbital Parameters 国际轨道数据源

    Parameter CZ-4B R/B STARLINK-31687
    Semimajor Axis (a) 6849.156 km 6861.206 km
    Eccentricity (e) 0.003174 0.000134
    Inclination (i) 97.3325° 43.0029°
    RAAN 277.4886° 290.6742°
    Perigee Argument 62.4447° 273.5252°
    Mean Anomaly (M) 298.0012° 86.5447°
    Apogee 492.757 km 483.987 km
    Perigee 449.281 km 482.151 km
    Orbit Epoch 2026-09-02T06:00:30+0000 2026-09-02T12:16:45+0000

    CZ-4B R/B & STARLINK-31687 Collision Probability (Pc) Trend

    CZ-4B R/B & STARLINK-31687 Collision Probability (Pc) TrendNot Available

    CZ-4B R/B & STARLINK-31687 Miss Distance (Miss Distance) Trend

    CZ-4B R/B & STARLINK-31687 Miss Distance (Miss Distance) TrendNot Available

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

    Object 1 Miss Distance TrendNot Available

    STARLINK-31687Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    CZ-4B R/BCollision Probability Trend

    Object 1 Probability TrendNot Available

    STARLINK-31687Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with CZ-4B R/B

    No nearby objects data