Conjunction Event Detail

    Low Risk
    Low collision probability. Continue monitoring.
    1.856644E-6
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-09-05T17:54:31+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 59149
    NORAD ID 59149
    Object Type DEBRIS
    Country
    US US

    Conjunction Constraints

    Parameter USA 18 OPS 4682 DEB
    Time of Closest Approach 2026-09-06T21:56:45+0000
    Collision Probability (Pc) 1.856644E-6
    Conjunction Distance (km) 2.336 km
    Relative Speed (km/s) 13.079 km/s
    Conjunction Risk Parameters R (Radial): -2.266 | I (In-track): 0.297 | C (Cross-track): 0.479
    Collision Risk Index (CRI) 0.4
    X Position (km) 4330.604 4329.255
    Position Y (km) 1531.092 1531.188
    Position Z (km) -6077.155 -6075.251
    Velocity X (km/s) -5.046 5.47
    Velocity Y (km/s) 3.795 1.877
    Velocity Z (km/s) -3.178 4.358

    Orbital Parameters 国际轨道数据源

    Parameter USA 18 OPS 4682 DEB
    Semimajor Axis (a) 7294.878 km 7633.419 km
    Eccentricity (e) 0.074536 0.003667
    Inclination (i) 63.2942° 90.2603°
    RAAN 162.7112° 19.0891°
    Perigee Argument 114.1032° 284.9862°
    Mean Anomaly (M) 253.9795° 74.7203°
    Apogee 1460.471 km 1283.273 km
    Perigee 373.011 km 1227.291 km
    Orbit Epoch 2026-09-05T03:31:00+0000 2026-09-05T01:56:33+0000

    USA 18 & OPS 4682 DEB Collision Probability (Pc) Trend

    USA 18 & OPS 4682 DEB Collision Probability (Pc) TrendNot Available

    USA 18 & OPS 4682 DEB Miss Distance (Miss Distance) Trend

    USA 18 & OPS 4682 DEB Miss Distance (Miss Distance) TrendNot Available

    USA 18Miss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    OPS 4682 DEBMiss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    USA 18Collision Probability Trend

    Object 1 Probability TrendNot Available

    OPS 4682 DEBCollision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with USA 18

    No nearby objects data