Conjunction Event Detail

    ✅
    Low Risk
    Low collision probability. Continue monitoring.
    5.438961E-6
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-10-28T00:59:53+0800
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    1 Object 1

    AOE ID 51117
    NORAD ID 51117
    Object Type PAYLOAD
    Country
    US US
    ← VS →

    2 Object 2

    AOE ID 53400
    NORAD ID 53400
    Object Type PAYLOAD
    Country
    US US

    Conjunction Constraints

    Parameter STARLINK-3391 STARLINK-4520
    Time of Closest Approach 2026-10-27T18:54:59+0000
    Collision Probability (Pc) 5.438961E-6
    Conjunction Distance (km) 1.535 km
    Relative Speed (km/s) 12.119 km/s
    Conjunction Risk Parameters R (Radial): -0.484 | I (In-track): 0.885 | C (Cross-track): -1.155
    Collision Risk Index (CRI) 0.5
    X Position (km) 5112.391 5112.975
    Position Y (km) -4379.485 -4378.069
    Position Z (km) 1199.345 1199.257
    Velocity X (km/s) 2.217 3.838
    Velocity Y (km/s) 4.226 2.836
    Velocity Z (km/s) 5.964 -5.965

    Orbital Parameters 国际轨道数据源

    Parameter STARLINK-3391 STARLINK-4520
    Semimajor Axis (a) 6838.191 km 6837.804 km
    Eccentricity (e) 0.000581 0.000127
    Inclination (i) 53.1413° 53.1593°
    RAAN 313.8794° 150.9036°
    Perigee Argument 280.0423° 77.5461°
    Mean Anomaly (M) 79.9923° 282.5684°
    Apogee 464.030 km 460.537 km
    Perigee 456.078 km 458.797 km
    Orbit Epoch 2026-10-27T07:55:31+0000 2026-10-26T23:26:41+0000

    STARLINK-3391 & STARLINK-4520 Collision Probability (Pc) Trend

    STARLINK-3391 & STARLINK-4520 Collision Probability (Pc) TrendNot Available

    STARLINK-3391 & STARLINK-4520 Miss Distance (Miss Distance) Trend

    STARLINK-3391 & STARLINK-4520 Miss Distance (Miss Distance) TrendNot Available

    STARLINK-3391Miss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    STARLINK-4520Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    STARLINK-3391Collision Probability Trend

    Object 1 Probability TrendNot Available

    STARLINK-4520Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with STARLINK-3391

    No nearby objects data