Conjunction Event Detail

    Low Risk
    Low collision probability. Continue monitoring.
    3.235913E-6
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-09-11T21:32:23+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 64915
    NORAD ID 64915
    Object Type PAYLOAD
    Country
    US US

    Conjunction Constraints

    Parameter USA 121 STARLINK-34636
    Time of Closest Approach 2026-09-14T02:53:46+0000
    Collision Probability (Pc) 3.235913E-6
    Conjunction Distance (km) 1.821 km
    Relative Speed (km/s) 12.103 km/s
    Conjunction Risk Parameters R (Radial): 0.383 | I (In-track): -1.091 | C (Cross-track): 1.407
    Collision Risk Index (CRI) 0.45
    X Position (km) 5302.999 5302.715
    Position Y (km) -2146.555 -2148.353
    Position Z (km) 3740.586 3740.656
    Velocity X (km/s) -1.92 4.764
    Velocity Y (km/s) 5.378 3.974
    Velocity Z (km/s) 5.534 -4.457

    Orbital Parameters 国际轨道数据源

    Parameter USA 121 STARLINK-34636
    Semimajor Axis (a) 7463.345 km 6840.791 km
    Eccentricity (e) 0.085574 0.000092
    Inclination (i) 63.3190° 53.1589°
    RAAN 326.3691° 200.8161°
    Perigee Argument 50.8548° 114.9159°
    Mean Anomaly (M) 316.5415° 245.1939°
    Apogee 1723.880 km 463.282 km
    Perigee 446.536 km 462.026 km
    Orbit Epoch 2026-09-11T05:13:17+0000 2026-09-11T05:31:23+0000

    USA 121 & STARLINK-34636 Collision Probability (Pc) Trend

    USA 121 & STARLINK-34636 Collision Probability (Pc) TrendNot Available

    USA 121 & STARLINK-34636 Miss Distance (Miss Distance) Trend

    USA 121 & STARLINK-34636 Miss Distance (Miss Distance) TrendNot Available

    USA 121Miss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    STARLINK-34636Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    USA 121Collision Probability Trend

    Object 1 Probability TrendNot Available

    STARLINK-34636Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with USA 121

    No nearby objects data