Conjunction Event Detail

    Low Risk
    Low collision probability. Continue monitoring.
    1.353398E-6
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-09-11T07:18:56+0800
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    1 Object 1

    AOE ID 53488
    NORAD ID 53488
    Object Type PAYLOAD
    Country
    US US
    VS

    2 Object 2

    AOE ID 54208
    NORAD ID 54208
    Object Type PAYLOAD
    Country
    US US

    Conjunction Constraints

    Parameter STARLINK-4421 STARLINK-5255
    Time of Closest Approach 2026-09-11T09:54:20+0000
    Collision Probability (Pc) 1.353398E-6
    Conjunction Distance (km) 2.962 km
    Relative Speed (km/s) 14.672 km/s
    Conjunction Risk Parameters R (Radial): 2.962 | I (In-track): 0.01 | C (Cross-track): 0.023
    Collision Risk Index (CRI) 0.38
    X Position (km) -6357.525 -6360.266
    Position Y (km) -1077.938 -1078.424
    Position Z (km) -2309.183 -2310.193
    Velocity X (km/s) 2.335 -1.138
    Velocity Y (km/s) 1.438 -5.118
    Velocity Z (km/s) -7.118 5.54

    Orbital Parameters 国际轨道数据源

    Parameter STARLINK-4421 STARLINK-5255
    Semimajor Axis (a) 6843.708 km 6848.897 km
    Eccentricity (e) 0.000099 0.000220
    Inclination (i) 97.2858° 53.1613°
    RAAN 11.4416° 215.2025°
    Perigee Argument 87.7716° 65.8166°
    Mean Anomaly (M) 272.3640° 294.3064°
    Apogee 466.251 km 472.265 km
    Perigee 464.891 km 469.255 km
    Orbit Epoch 2026-09-10T14:14:38+0000 2026-09-09T06:20:07+0000

    STARLINK-4421 & STARLINK-5255 Collision Probability (Pc) Trend

    STARLINK-4421 & STARLINK-5255 Collision Probability (Pc) TrendNot Available

    STARLINK-4421 & STARLINK-5255 Miss Distance (Miss Distance) Trend

    STARLINK-4421 & STARLINK-5255 Miss Distance (Miss Distance) TrendNot Available

    STARLINK-4421Miss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    STARLINK-5255Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    STARLINK-4421Collision Probability Trend

    Object 1 Probability TrendNot Available

    STARLINK-5255Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with STARLINK-4421

    No nearby objects data