Conjunction Event Detail

    ✅
    Low Risk
    Low collision probability. Continue monitoring.
    1.772686E-6
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-10-20T09:00:33+0800
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    1 Object 1

    AOE ID 47839
    NORAD ID 47839
    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-2431 HERMES 4
    Time of Closest Approach 2026-10-22T07:50:33+0000
    Collision Probability (Pc) 1.772686E-6
    Conjunction Distance (km) 2.107 km
    Relative Speed (km/s) 8.403 km/s
    Conjunction Risk Parameters R (Radial): -2.028 | I (In-track): 0.475 | C (Cross-track): -0.309
    Collision Risk Index (CRI) 0.4
    X Position (km) 4735.875 4734.757
    Position Y (km) 1337.305 1337.223
    Position Z (km) 4753.252 4751.469
    Velocity X (km/s) 1.092 5.401
    Velocity Y (km/s) 6.924 0.11
    Velocity Z (km/s) -3.027 -5.396

    Orbital Parameters 国际轨道数据源

    Parameter STARLINK-2431 HERMES 4
    Semimajor Axis (a) 6848.709 km 6846.057 km
    Eccentricity (e) 0.000145 0.000462
    Inclination (i) 53.1580° 97.3707°
    RAAN 256.2512° 185.4436°
    Perigee Argument 82.7857° 107.5329°
    Mean Anomaly (M) 277.3309° 252.6419°
    Apogee 471.563 km 471.086 km
    Perigee 469.581 km 464.754 km
    Orbit Epoch 2026-10-19T07:17:25+0000 2026-10-19T04:02:34+0000

    STARLINK-2431 & HERMES 4 Collision Probability (Pc) Trend

    STARLINK-2431 & HERMES 4 Collision Probability (Pc) TrendNot Available

    STARLINK-2431 & HERMES 4 Miss Distance (Miss Distance) Trend

    STARLINK-2431 & HERMES 4 Miss Distance (Miss Distance) TrendNot Available

    STARLINK-2431Miss 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-2431Collision Probability Trend

    Object 1 Probability TrendNot Available

    HERMES 4Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with STARLINK-2431

    No nearby objects data