Conjunction Event Detail

    Low Risk
    Low collision probability. Continue monitoring.
    1.527246E-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 64445
    NORAD ID 64445
    Object Type PAYLOAD
    Country
    US US

    Conjunction Constraints

    Parameter USA 55 STARLINK-34398
    Time of Closest Approach 2026-09-04T22:02:21+0000
    Collision Probability (Pc) 1.527246E-6
    Conjunction Distance (km) 2.67 km
    Relative Speed (km/s) 14.085 km/s
    Conjunction Risk Parameters R (Radial): 1.766 | I (In-track): -0.757 | C (Cross-track): 1.854
    Collision Risk Index (CRI) 0.39
    X Position (km) -5235.746 -5236.893
    Position Y (km) -1085.215 -1083.639
    Position Z (km) -4271.164 -4272.988
    Velocity X (km/s) -4.793 4.173
    Velocity Y (km/s) -0.283 -5.115
    Velocity Z (km/s) 5.907 -3.821

    Orbital Parameters 国际轨道数据源

    Parameter USA 55 STARLINK-34398
    Semimajor Axis (a) 6809.881 km 6840.830 km
    Eccentricity (e) 0.005379 0.000130
    Inclination (i) 94.0952° 53.1582°
    RAAN 187.8110° 339.9566°
    Perigee Argument 187.8301° 124.9232°
    Mean Anomaly (M) 172.2121° 235.1892°
    Apogee 468.378 km 463.582 km
    Perigee 395.110 km 461.804 km
    Orbit Epoch 2026-09-03T19:46:48+0000 2026-09-03T20:01:27+0000

    USA 55 & STARLINK-34398 Collision Probability (Pc) Trend

    USA 55 & STARLINK-34398 Collision Probability (Pc) TrendNot Available

    USA 55 & STARLINK-34398 Miss Distance (Miss Distance) Trend

    USA 55 & STARLINK-34398 Miss Distance (Miss Distance) TrendNot Available

    USA 55Miss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    STARLINK-34398Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    USA 55Collision Probability Trend

    Object 1 Probability TrendNot Available

    STARLINK-34398Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with USA 55

    No nearby objects data