Conjunction Event Detail

    Very Low Risk
    Very low collision probability. Continue monitoring.
    8.860446E-7
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-09-11T15:49:21+0800
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    1 Object 1

    AOE ID 53654
    NORAD ID 53654
    Object Type PAYLOAD
    Country
    US US
    VS

    2 Object 2

    AOE ID 57856
    NORAD ID 57856
    Object Type PAYLOAD
    Country
    US US

    Conjunction Constraints

    Parameter STARLINK-4420 STARLINK-30291
    Time of Closest Approach 2026-09-13T09:37:40+0000
    Collision Probability (Pc) 8.860446E-7
    Conjunction Distance (km) 2.729 km
    Relative Speed (km/s) 5.738 km/s
    Conjunction Risk Parameters R (Radial): 2.726 | I (In-track): 0.12 | C (Cross-track): 0.048
    Collision Risk Index (CRI) 0.34
    X Position (km) 4652.346 4654.217
    Position Y (km) -5012.324 -5014.293
    Position Z (km) -342.945 -343.205
    Velocity X (km/s) -0.961 3.153
    Velocity Y (km/s) -0.387 3.334
    Velocity Z (km/s) -7.561 -6.097

    Orbital Parameters 国际轨道数据源

    Parameter STARLINK-4420 STARLINK-30291
    Semimajor Axis (a) 6843.694 km 6848.892 km
    Eccentricity (e) 0.000139 0.000137
    Inclination (i) 97.2852° 53.1601°
    RAAN 130.5003° 146.6674°
    Perigee Argument 93.8334° 92.4422°
    Mean Anomaly (M) 266.3068° 267.6737°
    Apogee 466.510 km 471.694 km
    Perigee 464.604 km 469.816 km
    Orbit Epoch 2026-09-10T15:03:24+0000 2026-09-09T23:23:51+0000

    STARLINK-4420 & STARLINK-30291 Collision Probability (Pc) Trend

    STARLINK-4420 & STARLINK-30291 Collision Probability (Pc) TrendNot Available

    STARLINK-4420 & STARLINK-30291 Miss Distance (Miss Distance) Trend

    STARLINK-4420 & STARLINK-30291 Miss Distance (Miss Distance) TrendNot Available

    STARLINK-4420Miss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    STARLINK-30291Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    STARLINK-4420Collision Probability Trend

    Object 1 Probability TrendNot Available

    STARLINK-30291Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with STARLINK-4420

    No nearby objects data