Conjunction Event Detail

    Low Risk
    Low collision probability. Continue monitoring.
    1.771704E-6
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-09-12T16:11:10+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 53201
    NORAD ID 53201
    Object Type PAYLOAD
    Country
    US US

    Conjunction Constraints

    Parameter STARLINK-3977 STARLINK-4405
    Time of Closest Approach 2026-09-12T20:36:49+0000
    Collision Probability (Pc) 1.771704E-6
    Conjunction Distance (km) 2.481 km
    Relative Speed (km/s) 14.684 km/s
    Conjunction Risk Parameters R (Radial): 2.387 | I (In-track): 0.194 | C (Cross-track): -0.649
    Collision Risk Index (CRI) 0.4
    X Position (km) 5195.278 5193.025
    Position Y (km) -3748.646 -3747.78
    Position Z (km) -2399.883 -2399.31
    Velocity X (km/s) 1.195 1.524
    Velocity Y (km/s) 5.164 -2.411
    Velocity Z (km/s) -5.494 7.081

    Orbital Parameters 国际轨道数据源

    Parameter STARLINK-3977 STARLINK-4405
    Semimajor Axis (a) 6837.876 km 6833.259 km
    Eccentricity (e) 0.000114 0.000058
    Inclination (i) 53.1588° 97.4990°
    RAAN 133.5380° 320.2284°
    Perigee Argument 93.7868° 127.2220°
    Mean Anomaly (M) 266.3266° 232.9077°
    Apogee 460.520 km 455.520 km
    Perigee 458.958 km 454.724 km
    Orbit Epoch 2026-09-11T15:36:02+0000 2026-09-11T18:08:26+0000

    STARLINK-3977 & STARLINK-4405 Collision Probability (Pc) Trend

    STARLINK-3977 & STARLINK-4405 Collision Probability (Pc) TrendNot Available

    STARLINK-3977 & STARLINK-4405 Miss Distance (Miss Distance) Trend

    STARLINK-3977 & STARLINK-4405 Miss Distance (Miss Distance) TrendNot Available

    STARLINK-3977Miss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    STARLINK-4405Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    STARLINK-3977Collision Probability Trend

    Object 1 Probability TrendNot Available

    STARLINK-4405Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with STARLINK-3977

    No nearby objects data