Conjunction Event Detail

    ✅
    Low Risk
    Low collision probability. Continue monitoring.
    2.328322E-6
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-10-19T14:53:07+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 66151
    NORAD ID 66151
    Object Type PAYLOAD
    Country
    US US

    Conjunction Constraints

    Parameter USA 55 STARLINK-35540
    Time of Closest Approach 2026-10-20T08:50:03+0000
    Collision Probability (Pc) 2.328322E-6
    Conjunction Distance (km) 2.101 km
    Relative Speed (km/s) 12.943 km/s
    Conjunction Risk Parameters R (Radial): -0.862 | I (In-track): -1.002 | C (Cross-track): 1.632
    Collision Risk Index (CRI) 0.42
    X Position (km) 3815.423 3814.371
    Position Y (km) 2129.505 2130.635
    Position Z (km) -5269.643 -5271.068
    Velocity X (km/s) -4.679 -1.747
    Velocity Y (km/s) -3.587 7.233
    Velocity Z (km/s) -4.807 1.66

    Orbital Parameters 国际轨道数据源

    Parameter USA 55 STARLINK-35540
    Semimajor Axis (a) 6808.590 km 6840.809 km
    Eccentricity (e) 0.005460 0.000164
    Inclination (i) 94.1004° 53.1554°
    RAAN 213.3009° 102.7328°
    Perigee Argument 19.9836° 99.7288°
    Mean Anomaly (M) 340.3541° 260.3900°
    Apogee 467.626 km 463.792 km
    Perigee 393.280 km 461.552 km
    Orbit Epoch 2026-10-18T21:38:53+0000 2026-10-18T11:49:27+0000

    USA 55 & STARLINK-35540 Collision Probability (Pc) Trend

    USA 55 & STARLINK-35540 Collision Probability (Pc) TrendNot Available

    USA 55 & STARLINK-35540 Miss Distance (Miss Distance) Trend

    USA 55 & STARLINK-35540 Miss Distance (Miss Distance) TrendNot Available

    USA 55Miss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    STARLINK-35540Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    USA 55Collision Probability Trend

    Object 1 Probability TrendNot Available

    STARLINK-35540Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with USA 55

    No nearby objects data