Conjunction Event Detail

    Medium Risk
    Monitor closely. Maneuver recommended for primary asset.
    1.189802E-5
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-09-03T08:35:53+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 2026-09-04T17:34:42+0000
    Collision Probability (Pc) 1.189802E-5
    Conjunction Distance (km) 1.264 km
    Relative Speed (km/s) 14.613 km/s
    Conjunction Risk Parameters R (Radial): 0.06 | I (In-track): -0.362 | C (Cross-track): 1.209
    Collision Risk Index (CRI) 0.57
    X Position (km) -6722.895 -6723.173
    Position Y (km) -916.321 -915.168
    Position Z (km) 929.399 928.962
    Velocity X (km/s) 0.958 -0.202
    Velocity Y (km/s) 0.684 -4.687
    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) 6809.906 km 6848.879 km
    Eccentricity (e) 0.005359 0.000097
    Inclination (i) 94.0951° 53.1582°
    RAAN 187.1157° 25.9421°
    Perigee Argument 192.5967° 86.1641°
    Mean Anomaly (M) 167.3954° 273.9471°
    Apogee 468.264 km 471.403 km
    Perigee 395.274 km 470.081 km
    Orbit Epoch 2026-09-02T14:14:32+0000 2026-09-02T02:11:57+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