Conjunction Event Detail

    Low Risk
    Low collision probability. Continue monitoring.
    1.241402E-6
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-09-16T04:38:49+0800
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    1 Object 1

    AOE ID 4214
    NORAD ID 4214
    Object Type DEBRIS
    Country
    US US
    VS

    2 Object 2

    AOE ID 42812
    NORAD ID 42812
    Object Type PAYLOAD
    Country
    US US

    Conjunction Constraints

    Parameter THORAD AGENA D DEB IRIDIUM 121
    Time of Closest Approach 2026-09-16T18:53:39+0000
    Collision Probability (Pc) 1.241402E-6
    Conjunction Distance (km) 2.753 km
    Relative Speed (km/s) 10.659 km/s
    Conjunction Risk Parameters R (Radial): -2.737 | I (In-track): 0.194 | C (Cross-track): 0.201
    Collision Risk Index (CRI) 0.37
    X Position (km) 2045.555 2044.782
    Position Y (km) -1424.304 -1423.486
    Position Z (km) 6701.996 6699.485
    Velocity X (km/s) 5.324 -4.882
    Velocity Y (km/s) 5.176 5.039
    Velocity Z (km/s) -0.515 2.555

    Orbital Parameters 国际轨道数据源

    Parameter THORAD AGENA D DEB IRIDIUM 121
    Semimajor Axis (a) 7116.254 km 7155.809 km
    Eccentricity (e) 0.005952 0.000207
    Inclination (i) 70.0489° 86.3980°
    RAAN 226.1566° 315.9056°
    Perigee Argument 287.0755° 94.7535°
    Mean Anomaly (M) 72.3863° 265.3897°
    Apogee 780.470 km 779.153 km
    Perigee 695.764 km 776.191 km
    Orbit Epoch 2026-09-15T07:35:53+0000 2026-09-15T14:06:15+0000

    THORAD AGENA D DEB & IRIDIUM 121 Collision Probability (Pc) Trend

    THORAD AGENA D DEB & IRIDIUM 121 Collision Probability (Pc) TrendNot Available

    THORAD AGENA D DEB & IRIDIUM 121 Miss Distance (Miss Distance) Trend

    THORAD AGENA D DEB & IRIDIUM 121 Miss Distance (Miss Distance) TrendNot Available

    THORAD AGENA D DEBMiss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    IRIDIUM 121Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    THORAD AGENA D DEBCollision Probability Trend

    Object 1 Probability TrendNot Available

    IRIDIUM 121Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with THORAD AGENA D DEB

    No nearby objects data