Conjunction Event Detail

    Low Risk
    Low collision probability. Continue monitoring.
    1.512191E-6
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-09-04T15:57:05+0800
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    1 Object 1

    AOE ID 52640
    NORAD ID 52640
    Object Type PAYLOAD
    Country
    US US
    VS

    2 Object 2

    AOE ID 65934
    NORAD ID 65934
    Object Type PAYLOAD
    Country
    US US

    Conjunction Constraints

    Parameter STARLINK-3977 STARLINK-33921
    Time of Closest Approach 2026-09-05T04:21:54+0000
    Collision Probability (Pc) 1.512191E-6
    Conjunction Distance (km) 2.402 km
    Relative Speed (km/s) 10.174 km/s
    Conjunction Risk Parameters R (Radial): 2.32 | I (In-track): -0.469 | C (Cross-track): -0.411
    Collision Risk Index (CRI) 0.39
    X Position (km) 5252.412 5254.383
    Position Y (km) 1648.558 1648.523
    Position Z (km) -4063.991 -4065.364
    Velocity X (km/s) -4.583 1.179
    Velocity Y (km/s) 4.521 6.328
    Velocity Z (km/s) -4.094 4.093

    Orbital Parameters 国际轨道数据源

    Parameter STARLINK-3977 STARLINK-33921
    Semimajor Axis (a) 6837.872 km 6840.805 km
    Eccentricity (e) 0.000115 0.000018
    Inclination (i) 53.1590° 53.1611°
    RAAN 173.4624° 57.0731°
    Perigee Argument 85.2366° 158.2280°
    Mean Anomaly (M) 274.8768° 201.8730°
    Apogee 460.520 km 462.792 km
    Perigee 458.950 km 462.544 km
    Orbit Epoch 2026-09-03T02:56:51+0000 2026-09-03T21:18:33+0000

    STARLINK-3977 & STARLINK-33921 Collision Probability (Pc) Trend

    STARLINK-3977 & STARLINK-33921 Collision Probability (Pc) TrendNot Available

    STARLINK-3977 & STARLINK-33921 Miss Distance (Miss Distance) Trend

    STARLINK-3977 & STARLINK-33921 Miss Distance (Miss Distance) TrendNot Available

    STARLINK-3977Miss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    STARLINK-33921Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    STARLINK-3977Collision Probability Trend

    Object 1 Probability TrendNot Available

    STARLINK-33921Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with STARLINK-3977

    No nearby objects data