Conjunction Event Detail

    Low Risk
    Low collision probability. Continue monitoring.
    1.458224E-6
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-09-04T11:55:44+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 48557
    NORAD ID 48557
    Object Type PAYLOAD
    Country
    US US

    Conjunction Constraints

    Parameter USA 55 STARLINK-2155
    Time of Closest Approach 2026-09-04T17:34:43+0000
    Collision Probability (Pc) 1.458224E-6
    Conjunction Distance (km) 2.794 km
    Relative Speed (km/s) 14.613 km/s
    Conjunction Risk Parameters R (Radial): 0.031 | I (In-track): -0.798 | C (Cross-track): 2.677
    Collision Risk Index (CRI) 0.38
    X Position (km) -6722.647 -6723.163
    Position Y (km) -916.088 -913.522
    Position Z (km) 932.423 931.448
    Velocity X (km/s) 0.962 -0.205
    Velocity Y (km/s) 0.684 -4.688
    Velocity Z (km/s) 7.519 -6.02

    Orbital Parameters 国际轨道数据源

    Parameter USA 55 STARLINK-2155
    Semimajor Axis (a) 6809.881 km 6848.842 km
    Eccentricity (e) 0.005379 0.000089
    Inclination (i) 94.0952° 53.1587°
    RAAN 187.8110° 18.0433°
    Perigee Argument 187.8301° 82.5502°
    Mean Anomaly (M) 172.2121° 277.5601°
    Apogee 468.378 km 471.316 km
    Perigee 395.110 km 470.094 km
    Orbit Epoch 2026-09-03T19:46:48+0000 2026-09-03T18:54:55+0000

    USA 55 & STARLINK-2155 Collision Probability (Pc) Trend

    USA 55 & STARLINK-2155 Collision Probability (Pc) TrendNot Available

    USA 55 & STARLINK-2155 Miss Distance (Miss Distance) Trend

    USA 55 & STARLINK-2155 Miss Distance (Miss Distance) TrendNot Available

    USA 55Miss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    STARLINK-2155Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    USA 55Collision Probability Trend

    Object 1 Probability TrendNot Available

    STARLINK-2155Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with USA 55

    No nearby objects data