Conjunction Event Detail

    Low Risk
    Low collision probability. Continue monitoring.
    3.782523E-6
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-09-11T21:32:24+0800
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    1 Object 1

    Name USA 121
    AOE ID 23908
    NORAD ID 23908
    Object Type PAYLOAD
    Country
    US US
    VS

    2 Object 2

    AOE ID 67116
    NORAD ID 67116
    Object Type PAYLOAD
    Country
    US US

    Conjunction Constraints

    Parameter USA 121 STARLINK-35738
    Time of Closest Approach 2026-09-13T12:36:20+0000
    Collision Probability (Pc) 3.782523E-6
    Conjunction Distance (km) 1.705 km
    Relative Speed (km/s) 11.455 km/s
    Conjunction Risk Parameters R (Radial): 0.58 | I (In-track): 1.067 | C (Cross-track): -1.196
    Collision Risk Index (CRI) 0.47
    X Position (km) 5549.247 5550.248
    Position Y (km) -2584.909 -2583.643
    Position Z (km) 3088.522 3089.069
    Velocity X (km/s) -1.3 4.428
    Velocity Y (km/s) 5.002 4.831
    Velocity Z (km/s) 6.014 -3.904

    Orbital Parameters 国际轨道数据源

    Parameter USA 121 STARLINK-35738
    Semimajor Axis (a) 7463.345 km 6861.121 km
    Eccentricity (e) 0.085574 0.000100
    Inclination (i) 63.3190° 43.0002°
    RAAN 326.3691° 200.8943°
    Perigee Argument 50.8548° 277.8543°
    Mean Anomaly (M) 316.5415° 82.2196°
    Apogee 1723.880 km 483.667 km
    Perigee 446.536 km 482.301 km
    Orbit Epoch 2026-09-11T05:13:17+0000 2026-09-11T05:04:46+0000

    USA 121 & STARLINK-35738 Collision Probability (Pc) Trend

    USA 121 & STARLINK-35738 Collision Probability (Pc) TrendNot Available

    USA 121 & STARLINK-35738 Miss Distance (Miss Distance) Trend

    USA 121 & STARLINK-35738 Miss Distance (Miss Distance) TrendNot Available

    USA 121Miss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    STARLINK-35738Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    USA 121Collision Probability Trend

    Object 1 Probability TrendNot Available

    STARLINK-35738Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with USA 121

    No nearby objects data