Conjunction Event Detail

    Low Risk
    Low collision probability. Continue monitoring.
    1.988349E-6
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-09-03T10:45:32+0800
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    1 Object 1

    AOE ID 58885
    NORAD ID 58885
    Object Type PAYLOAD
    Country
    US US
    VS

    2 Object 2

    AOE ID 63833
    NORAD ID 63833
    Object Type PAYLOAD
    Country
    IT IT

    Conjunction Constraints

    Parameter STARLINK-31318 HERMES 4
    Time of Closest Approach 2026-09-03T23:13:27+0000
    Collision Probability (Pc) 1.988349E-6
    Conjunction Distance (km) 2.093 km
    Relative Speed (km/s) 9.89 km/s
    Conjunction Risk Parameters R (Radial): -0.197 | I (In-track): -1.586 | C (Cross-track): 1.352
    Collision Risk Index (CRI) 0.41
    X Position (km) -3778.547 -3780.373
    Position Y (km) 2240.505 2240.417
    Position Z (km) -5261.616 -5260.598
    Velocity X (km/s) -5.409 -4.15
    Velocity Y (km/s) -5.084 4.233
    Velocity Z (km/s) 1.72 4.787

    Orbital Parameters 国际轨道数据源

    Parameter STARLINK-31318 HERMES 4
    Semimajor Axis (a) 6848.851 km 6848.341 km
    Eccentricity (e) 0.000113 0.000108
    Inclination (i) 53.1579° 97.3755°
    RAAN 225.9374° 138.7449°
    Perigee Argument 78.7590° 333.7263°
    Mean Anomaly (M) 281.3539° 26.3924°
    Apogee 471.489 km 470.943 km
    Perigee 469.939 km 469.465 km
    Orbit Epoch 2026-09-01T05:46:23+0000 2026-09-02T06:41:06+0000

    STARLINK-31318 & HERMES 4 Collision Probability (Pc) Trend

    STARLINK-31318 & HERMES 4 Collision Probability (Pc) TrendNot Available

    STARLINK-31318 & HERMES 4 Miss Distance (Miss Distance) Trend

    STARLINK-31318 & HERMES 4 Miss Distance (Miss Distance) TrendNot Available

    STARLINK-31318Miss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    HERMES 4Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    STARLINK-31318Collision Probability Trend

    Object 1 Probability TrendNot Available

    HERMES 4Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with STARLINK-31318

    No nearby objects data