Conjunction Event Detail

    ✅
    Low Risk
    Low collision probability. Continue monitoring.
    9.552744E-6
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-10-23T20:39:20+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 54780
    NORAD ID 54780
    Object Type PAYLOAD
    Country
    US US

    Conjunction Constraints

    Parameter USA 55 STARLINK-5449
    Time of Closest Approach 2026-10-23T23:47:29+0000
    Collision Probability (Pc) 9.552744E-6
    Conjunction Distance (km) 1.34 km
    Relative Speed (km/s) 14.272 km/s
    Conjunction Risk Parameters R (Radial): -0.006 | I (In-track): 0.458 | C (Cross-track): -1.259
    Collision Risk Index (CRI) 0.55
    X Position (km) 4760.981 4761.919
    Position Y (km) 3146.079 3145.256
    Position Z (km) -3780.7 -3780.213
    Velocity X (km/s) -3.147 -0.583
    Velocity Y (km/s) -2.862 6.19
    Velocity Z (km/s) -6.311 4.421

    Orbital Parameters 国际轨道数据源

    Parameter USA 55 STARLINK-5449
    Semimajor Axis (a) 6808.419 km 6840.797 km
    Eccentricity (e) 0.005365 0.000096
    Inclination (i) 94.1012° 53.1600°
    RAAN 215.7567° 68.9707°
    Perigee Argument 3.4329° 84.0796°
    Mean Anomaly (M) 356.7284° 276.0316°
    Apogee 466.812 km 463.316 km
    Perigee 393.752 km 462.004 km
    Orbit Epoch 2026-10-23T05:46:27+0000 2026-10-22T18:16:46+0000

    USA 55 & STARLINK-5449 Collision Probability (Pc) Trend

    USA 55 & STARLINK-5449 Collision Probability (Pc) TrendNot Available

    USA 55 & STARLINK-5449 Miss Distance (Miss Distance) Trend

    USA 55 & STARLINK-5449 Miss Distance (Miss Distance) TrendNot Available

    USA 55Miss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    STARLINK-5449Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    USA 55Collision Probability Trend

    Object 1 Probability TrendNot Available

    STARLINK-5449Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with USA 55

    No nearby objects data