Conjunction Event Detail

    Low Risk
    Low collision probability. Continue monitoring.
    1.515568E-6
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-09-11T23:15:36+0800
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    1 Object 1

    AOE ID 49428
    NORAD ID 49428
    Object Type PAYLOAD
    Country
    US US
    VS

    2 Object 2

    AOE ID 58364
    NORAD ID 58364
    Object Type PAYLOAD
    Country
    US US

    Conjunction Constraints

    Parameter STARLINK-3121 STARLINK-30904
    Time of Closest Approach 2026-09-13T09:30:12+0000
    Collision Probability (Pc) 1.515568E-6
    Conjunction Distance (km) 2.066 km
    Relative Speed (km/s) 6.017 km/s
    Conjunction Risk Parameters R (Radial): 1.018 | I (In-track): 1.649 | C (Cross-track): 0.717
    Collision Risk Index (CRI) 0.39
    X Position (km) 4209.022 4210.428
    Position Y (km) -2938.274 -2937.118
    Position Z (km) -4612.643 -4613.619
    Velocity X (km/s) 1.045 5.029
    Velocity Y (km/s) 6.74 5.608
    Velocity Z (km/s) -3.345 1.02

    Orbital Parameters 国际轨道数据源

    Parameter STARLINK-3121 STARLINK-30904
    Semimajor Axis (a) 6896.380 km 6908.121 km
    Eccentricity (e) 0.000220 0.001304
    Inclination (i) 53.1597° 42.9995°
    RAAN 113.7153° 54.2705°
    Perigee Argument 118.1621° 266.0334°
    Mean Anomaly (M) 241.9596° 93.9022°
    Apogee 519.764 km 538.991 km
    Perigee 516.722 km 520.977 km
    Orbit Epoch 2026-09-10T23:30:05+0000 2026-09-10T18:26:06+0000

    STARLINK-3121 & STARLINK-30904 Collision Probability (Pc) Trend

    STARLINK-3121 & STARLINK-30904 Collision Probability (Pc) TrendNot Available

    STARLINK-3121 & STARLINK-30904 Miss Distance (Miss Distance) Trend

    STARLINK-3121 & STARLINK-30904 Miss Distance (Miss Distance) TrendNot Available

    STARLINK-3121Miss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    STARLINK-30904Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    STARLINK-3121Collision Probability Trend

    Object 1 Probability TrendNot Available

    STARLINK-30904Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with STARLINK-3121

    No nearby objects data