Conjunction Event Detail

    ✅
    Low Risk
    Low collision probability. Continue monitoring.
    8.581972E-6
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-10-28T07:09:49+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 65602
    NORAD ID 65602
    Object Type PAYLOAD
    Country
    US US

    Conjunction Constraints

    Parameter HERMES 4 STARLINK-35255
    Time of Closest Approach 2026-10-29T05:29:54+0000
    Collision Probability (Pc) 8.581972E-6
    Conjunction Distance (km) 1.399 km
    Relative Speed (km/s) 15.075 km/s
    Conjunction Risk Parameters R (Radial): 0.402 | I (In-track): 0.222 | C (Cross-track): -1.32
    Collision Risk Index (CRI) 0.54
    X Position (km) -5367.765 -5367.216
    Position Y (km) -929.567 -930.831
    Position Z (km) 4137.284 4137.048
    Velocity X (km/s) 4.291 -4.708
    Velocity Y (km/s) 1.991 0.417
    Velocity Z (km/s) 5.994 -5.997

    Orbital Parameters 国际轨道数据源

    Parameter HERMES 4 STARLINK-35255
    Semimajor Axis (a) 6845.659 km 6843.681 km
    Eccentricity (e) 0.000481 0.000119
    Inclination (i) 97.3715° 97.2821°
    RAAN 192.4035° 2.2471°
    Perigee Argument 93.4486° 111.3870°
    Mean Anomaly (M) 266.7306° 248.7500°
    Apogee 470.814 km 466.360 km
    Perigee 464.230 km 464.728 km
    Orbit Epoch 2026-10-26T03:41:48+0000 2026-10-27T04:19:53+0000

    HERMES 4 & STARLINK-35255 Collision Probability (Pc) Trend

    HERMES 4 & STARLINK-35255 Collision Probability (Pc) TrendNot Available

    HERMES 4 & STARLINK-35255 Miss Distance (Miss Distance) Trend

    HERMES 4 & STARLINK-35255 Miss Distance (Miss Distance) TrendNot Available

    HERMES 4Miss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    STARLINK-35255Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    HERMES 4Collision Probability Trend

    Object 1 Probability TrendNot Available

    STARLINK-35255Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with HERMES 4

    No nearby objects data