Conjunction Event Detail

    ✅
    Low Risk
    Low collision probability. Continue monitoring.
    1.177509E-6
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-10-20T13:45:22+0800
    View CDM
    Download CDM 1.0

    1 Object 1

    AOE ID 52621
    NORAD ID 52621
    Object Type PAYLOAD
    Country
    US US
    ← VS →

    2 Object 2

    AOE ID 53570
    NORAD ID 53570
    Object Type PAYLOAD
    Country
    US US

    Conjunction Constraints

    Parameter STARLINK-3984 STARLINK-4550
    Time of Closest Approach 2026-10-21T07:51:32+0000
    Collision Probability (Pc) 1.177509E-6
    Conjunction Distance (km) 2.967 km
    Relative Speed (km/s) 11.539 km/s
    Conjunction Risk Parameters R (Radial): 2.567 | I (In-track): 0.974 | C (Cross-track): -1.126
    Collision Risk Index (CRI) 0.36
    X Position (km) 3052.147 3054.591
    Position Y (km) -5471.652 -5472.979
    Position Z (km) -2749.138 -2750.171
    Velocity X (km/s) 5.491 3.235
    Velocity Y (km/s) 0.413 4.455
    Velocity Z (km/s) 5.285 -5.284

    Orbital Parameters 国际轨道数据源

    Parameter STARLINK-3984 STARLINK-4550
    Semimajor Axis (a) 6837.874 km 6840.868 km
    Eccentricity (e) 0.000157 0.000120
    Inclination (i) 53.1574° 53.1593°
    RAAN 326.8716° 107.1435°
    Perigee Argument 95.0595° 95.1785°
    Mean Anomaly (M) 265.0587° 264.9355°
    Apogee 460.812 km 463.554 km
    Perigee 458.662 km 461.908 km
    Orbit Epoch 2026-10-19T12:14:50+0000 2026-10-19T18:59:33+0000

    STARLINK-3984 & STARLINK-4550 Collision Probability (Pc) Trend

    STARLINK-3984 & STARLINK-4550 Collision Probability (Pc) TrendNot Available

    STARLINK-3984 & STARLINK-4550 Miss Distance (Miss Distance) Trend

    STARLINK-3984 & STARLINK-4550 Miss Distance (Miss Distance) TrendNot Available

    STARLINK-3984Miss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    STARLINK-4550Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    STARLINK-3984Collision Probability Trend

    Object 1 Probability TrendNot Available

    STARLINK-4550Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with STARLINK-3984

    No nearby objects data