Conjunction Event Detail

    ⚠
    Medium Risk
    Monitor closely. Maneuver recommended for primary asset.
    1.549422E-5
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-10-20T13:35:19+0800
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    1 Object 1

    AOE ID 49428
    NORAD ID 49428
    Object Type PAYLOAD
    Country
    US US
    ← VS →

    2 Object 2

    AOE ID 68454
    NORAD ID 68454
    Object Type PAYLOAD
    Country
    NO NO

    Conjunction Constraints

    Parameter STARLINK-3121 AISSAT 4
    Time of Closest Approach 2026-10-20T13:03:27+0000
    Collision Probability (Pc) 1.549422E-5
    Conjunction Distance (km) 1.027 km
    Relative Speed (km/s) 7.619 km/s
    Conjunction Risk Parameters R (Radial): -0.546 | I (In-track): 0.75 | C (Cross-track): -0.439
    Collision Risk Index (CRI) 0.59
    X Position (km) 1257.588 1257.319
    Position Y (km) 5205.571 5205.727
    Position Z (km) 4330.306 4329.327
    Velocity X (km/s) -4.988 2.346
    Velocity Y (km/s) 4.345 4.295
    Velocity Z (km/s) -3.762 -5.825

    Orbital Parameters 国际轨道数据源

    Parameter STARLINK-3121 AISSAT 4
    Semimajor Axis (a) 6892.393 km 6886.930 km
    Eccentricity (e) 0.000173 0.000542
    Inclination (i) 53.1587° 97.4734°
    RAAN 298.9442° 249.6530°
    Perigee Argument 42.3271° 12.0661°
    Mean Anomaly (M) 317.7858° 348.0702°
    Apogee 515.452 km 512.524 km
    Perigee 513.060 km 505.062 km
    Orbit Epoch 2026-10-19T09:37:10+0000 2026-10-19T20:37:54+0000

    STARLINK-3121 & AISSAT 4 Collision Probability (Pc) Trend

    STARLINK-3121 & AISSAT 4 Collision Probability (Pc) TrendNot Available

    STARLINK-3121 & AISSAT 4 Miss Distance (Miss Distance) Trend

    STARLINK-3121 & AISSAT 4 Miss Distance (Miss Distance) TrendNot Available

    STARLINK-3121Miss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    AISSAT 4Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    STARLINK-3121Collision Probability Trend

    Object 1 Probability TrendNot Available

    AISSAT 4Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with STARLINK-3121

    No nearby objects data