Conjunction Event Detail

    Low Risk
    Low collision probability. Continue monitoring.
    4.087664E-6
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-09-05T17:54:18+0800
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    1 Object 1

    Name USA 18
    AOE ID 16631
    NORAD ID 16631
    Object Type PAYLOAD
    Country
    US US
    VS

    2 Object 2

    AOE ID 30465
    NORAD ID 30465
    Object Type DEBRIS
    Country
    CN CN

    Conjunction Constraints

    Parameter USA 18 FENGYUN 1C DEB
    Time of Closest Approach 2026-09-07T00:27:48+0000
    Collision Probability (Pc) 4.087664E-6
    Conjunction Distance (km) 1.756 km
    Relative Speed (km/s) 14.729 km/s
    Conjunction Risk Parameters R (Radial): 0.418 | I (In-track): 0.323 | C (Cross-track): -1.673
    Collision Risk Index (CRI) 0.47
    X Position (km) -6163.045 -6163.857
    Position Y (km) 606.377 604.851
    Position Z (km) 3589.873 3589.568
    Velocity X (km/s) 3.297 -3.54
    Velocity Y (km/s) -4.245 1.676
    Velocity Z (km/s) 5.277 -6.347

    Orbital Parameters 国际轨道数据源

    Parameter USA 18 FENGYUN 1C DEB
    Semimajor Axis (a) 7294.878 km 7149.347 km
    Eccentricity (e) 0.074536 0.001531
    Inclination (i) 63.2942° 98.8259°
    RAAN 162.7112° 345.9433°
    Perigee Argument 114.1032° 328.8235°
    Mean Anomaly (M) 253.9795° 155.4325°
    Apogee 1460.471 km 782.157 km
    Perigee 373.011 km 760.263 km
    Orbit Epoch 2026-09-05T03:31:00+0000 2026-09-03T19:25:53+0000

    USA 18 & FENGYUN 1C DEB Collision Probability (Pc) Trend

    USA 18 & FENGYUN 1C DEB Collision Probability (Pc) TrendNot Available

    USA 18 & FENGYUN 1C DEB Miss Distance (Miss Distance) Trend

    USA 18 & FENGYUN 1C DEB Miss Distance (Miss Distance) TrendNot Available

    USA 18Miss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    FENGYUN 1C DEBMiss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    USA 18Collision Probability Trend

    Object 1 Probability TrendNot Available

    FENGYUN 1C DEBCollision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with USA 18

    No nearby objects data