Conjunction Event Detail

    Low Risk
    Low collision probability. Continue monitoring.
    3.78745E-6
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-09-04T15:24:16+0800
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    1 Object 1

    AOE ID 47861
    NORAD ID 47861
    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-2280 HERMES 4
    Time of Closest Approach 2026-09-06T03:11:54+0000
    Collision Probability (Pc) 3.78745E-6
    Conjunction Distance (km) 1.471 km
    Relative Speed (km/s) 5.761 km/s
    Conjunction Risk Parameters R (Radial): 1.287 | I (In-track): 0.661 | C (Cross-track): 0.266
    Collision Risk Index (CRI) 0.47
    X Position (km) -5379.712 -5380.794
    Position Y (km) 4204.163 4204.775
    Position Z (km) 540.524 541.311
    Velocity X (km/s) -2.44 1.082
    Velocity Y (km/s) -3.917 0.4
    Velocity Z (km/s) 6.079 7.543

    Orbital Parameters 国际轨道数据源

    Parameter STARLINK-2280 HERMES 4
    Semimajor Axis (a) 6848.856 km 6848.295 km
    Eccentricity (e) 0.000133 0.000096
    Inclination (i) 53.1597° 97.3754°
    RAAN 149.8382° 139.9158°
    Perigee Argument 79.5077° 324.3507°
    Mean Anomaly (M) 280.6074° 35.7670°
    Apogee 471.628 km 470.817 km
    Perigee 469.810 km 469.499 km
    Orbit Epoch 2026-09-03T17:13:56+0000 2026-09-03T10:54:13+0000

    STARLINK-2280 & HERMES 4 Collision Probability (Pc) Trend

    STARLINK-2280 & HERMES 4 Collision Probability (Pc) TrendNot Available

    STARLINK-2280 & HERMES 4 Miss Distance (Miss Distance) Trend

    STARLINK-2280 & HERMES 4 Miss Distance (Miss Distance) TrendNot Available

    STARLINK-2280Miss 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-2280Collision Probability Trend

    Object 1 Probability TrendNot Available

    HERMES 4Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with STARLINK-2280

    No nearby objects data