Conjunction Event Detail

    Low Risk
    Low collision probability. Continue monitoring.
    9.619734E-6
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-09-04T11:55:46+0800
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    1 Object 1

    Name USA 55
    AOE ID 20547
    NORAD ID 20547
    Object Type PAYLOAD
    Country
    US US
    VS

    2 Object 2

    AOE ID 64766
    NORAD ID 64766
    Object Type PAYLOAD
    Country
    US US

    Conjunction Constraints

    Parameter USA 55 STARLINK-34645
    Time of Closest Approach 2026-09-04T19:18:14+0000
    Collision Probability (Pc) 9.619734E-6
    Conjunction Distance (km) 1.204 km
    Relative Speed (km/s) 8.465 km/s
    Conjunction Risk Parameters R (Radial): 1.045 | I (In-track): -0.492 | C (Cross-track): 0.338
    Collision Risk Index (CRI) 0.55
    X Position (km) -4657.557 -4658.672
    Position Y (km) -323.564 -323.357
    Position Z (km) 4988.602 4989.005
    Velocity X (km/s) 5.492 3.134
    Velocity Y (km/s) 1.18 -6.503
    Velocity Z (km/s) 5.153 2.499

    Orbital Parameters 国际轨道数据源

    Parameter USA 55 STARLINK-34645
    Semimajor Axis (a) 6809.881 km 6840.846 km
    Eccentricity (e) 0.005379 0.000136
    Inclination (i) 94.0952° 53.1601°
    RAAN 187.8110° 135.9837°
    Perigee Argument 187.8301° 50.1025°
    Mean Anomaly (M) 172.2121° 310.0097°
    Apogee 468.378 km 463.638 km
    Perigee 395.110 km 461.780 km
    Orbit Epoch 2026-09-03T19:46:48+0000 2026-09-03T16:26:36+0000

    USA 55 & STARLINK-34645 Collision Probability (Pc) Trend

    USA 55 & STARLINK-34645 Collision Probability (Pc) TrendNot Available

    USA 55 & STARLINK-34645 Miss Distance (Miss Distance) Trend

    USA 55 & STARLINK-34645 Miss Distance (Miss Distance) TrendNot Available

    USA 55Miss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    STARLINK-34645Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    USA 55Collision Probability Trend

    Object 1 Probability TrendNot Available

    STARLINK-34645Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with USA 55

    No nearby objects data