Conjunction Event Detail

    ✅
    Low Risk
    Low collision probability. Continue monitoring.
    5.631972E-6
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-10-21T10:23:11+0800
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    1 Object 1

    AOE ID 63833
    NORAD ID 63833
    Object Type PAYLOAD
    Country
    IT IT
    ← VS →

    2 Object 2

    AOE ID 65604
    NORAD ID 65604
    Object Type PAYLOAD
    Country
    US US

    Conjunction Constraints

    Parameter HERMES 4 STARLINK-35251
    Time of Closest Approach 2026-10-22T16:49:09+0000
    Collision Probability (Pc) 5.631972E-6
    Conjunction Distance (km) 1.589 km
    Relative Speed (km/s) 15.073 km/s
    Conjunction Risk Parameters R (Radial): -1.42 | I (In-track): 0.126 | C (Cross-track): 0.702
    Collision Risk Index (CRI) 0.5
    X Position (km) -5431.688 -5430.596
    Position Y (km) -313.022 -312.246
    Position Z (km) 4148.022 4147.169
    Velocity X (km/s) 4.5 -4.641
    Velocity Y (km/s) 1.493 0.952
    Velocity Z (km/s) 5.984 -5.988

    Orbital Parameters 国际轨道数据源

    Parameter HERMES 4 STARLINK-35251
    Semimajor Axis (a) 6846.005 km 6843.664 km
    Eccentricity (e) 0.000467 0.000104
    Inclination (i) 97.3711° 97.2852°
    RAAN 186.4193° 355.7383°
    Perigee Argument 105.3853° 106.6413°
    Mean Anomaly (M) 254.7906° 253.4945°
    Apogee 471.068 km 466.242 km
    Perigee 464.668 km 464.812 km
    Orbit Epoch 2026-10-20T03:32:48+0000 2026-10-20T17:13:10+0000

    HERMES 4 & STARLINK-35251 Collision Probability (Pc) Trend

    HERMES 4 & STARLINK-35251 Collision Probability (Pc) TrendNot Available

    HERMES 4 & STARLINK-35251 Miss Distance (Miss Distance) Trend

    HERMES 4 & STARLINK-35251 Miss Distance (Miss Distance) TrendNot Available

    HERMES 4Miss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    STARLINK-35251Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    HERMES 4Collision Probability Trend

    Object 1 Probability TrendNot Available

    STARLINK-35251Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with HERMES 4

    No nearby objects data