Conjunction Event Detail

    ✅
    Low Risk
    Low collision probability. Continue monitoring.
    1.476932E-6
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-10-20T05:35:36+0800
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    1 Object 1

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

    2 Object 2

    AOE ID 59539
    NORAD ID 59539
    Object Type PAYLOAD
    Country
    US US

    Conjunction Constraints

    Parameter CZ-4B R/B STARLINK-31539
    Time of Closest Approach 2026-10-21T12:03:46+0000
    Collision Probability (Pc) 1.476932E-6
    Conjunction Distance (km) 2.748 km
    Relative Speed (km/s) 14.34 km/s
    Conjunction Risk Parameters R (Radial): -1.552 | I (In-track): 0.775 | C (Cross-track): 2.131
    Collision Risk Index (CRI) 0.38
    X Position (km) 5677.458 5677.644
    Position Y (km) -3839.953 -3842.517
    Position Z (km) 269.95 268.98
    Velocity X (km/s) -0.782 3.3
    Velocity Y (km/s) -0.644 4.504
    Velocity Z (km/s) 7.552 -5.194

    Orbital Parameters 国际轨道数据源

    Parameter CZ-4B R/B STARLINK-31539
    Semimajor Axis (a) 6847.445 km 6861.194 km
    Eccentricity (e) 0.002795 0.000127
    Inclination (i) 97.3268° 43.0010°
    RAAN 324.2789° 162.5430°
    Perigee Argument 250.3594° 270.2881°
    Mean Anomaly (M) 109.4630° 89.7826°
    Apogee 488.448 km 483.927 km
    Perigee 450.168 km 482.187 km
    Orbit Epoch 2026-10-19T13:01:52+0000 2026-10-18T23:39:39+0000

    CZ-4B R/B & STARLINK-31539 Collision Probability (Pc) Trend

    CZ-4B R/B & STARLINK-31539 Collision Probability (Pc) TrendNot Available

    CZ-4B R/B & STARLINK-31539 Miss Distance (Miss Distance) Trend

    CZ-4B R/B & STARLINK-31539 Miss Distance (Miss Distance) TrendNot Available

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

    Object 1 Miss Distance TrendNot Available

    STARLINK-31539Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    CZ-4B R/BCollision Probability Trend

    Object 1 Probability TrendNot Available

    STARLINK-31539Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with CZ-4B R/B

    No nearby objects data