Conjunction Event Detail

    Very Low Risk
    Very low collision probability. Continue monitoring.
    5.445048E-7
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-09-15T23:57:45+0800
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    1 Object 1

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

    2 Object 2

    AOE ID 54905
    NORAD ID 54905
    Object Type DEBRIS
    Country
    CN CN

    Conjunction Constraints

    Parameter IRIDIUM 121 CZ-6A DEB
    Time of Closest Approach 2026-09-16T17:56:15+0000
    Collision Probability (Pc) 5.445048E-7
    Conjunction Distance (km) 2.735 km
    Relative Speed (km/s) 2.23 km/s
    Conjunction Risk Parameters R (Radial): -1.002 | I (In-track): 2.518 | C (Cross-track): 0.369
    Collision Risk Index (CRI) 0.3
    X Position (km) -3868.24 -3870.23
    Position Y (km) 3369.646 3371.152
    Position Z (km) -5000.025 -4998.906
    Velocity X (km/s) 3.476 4.869
    Velocity Y (km/s) -3.895 -2.16
    Velocity Z (km/s) -5.32 -5.179

    Orbital Parameters 国际轨道数据源

    Parameter IRIDIUM 121 CZ-6A DEB
    Semimajor Axis (a) 7155.809 km 7111.708 km
    Eccentricity (e) 0.000207 0.008037
    Inclination (i) 86.3982° 98.7042°
    RAAN 316.3137° 325.9149°
    Perigee Argument 94.7746° 13.8781°
    Mean Anomaly (M) 265.3686° 346.4594°
    Apogee 779.155 km 790.730 km
    Perigee 776.189 km 676.412 km
    Orbit Epoch 2026-09-14T14:39:43+0000 2026-09-15T04:24:18+0000

    IRIDIUM 121 & CZ-6A DEB Collision Probability (Pc) Trend

    IRIDIUM 121 & CZ-6A DEB Collision Probability (Pc) TrendNot Available

    IRIDIUM 121 & CZ-6A DEB Miss Distance (Miss Distance) Trend

    IRIDIUM 121 & CZ-6A DEB Miss Distance (Miss Distance) TrendNot Available

    IRIDIUM 121Miss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    CZ-6A DEBMiss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    IRIDIUM 121Collision Probability Trend

    Object 1 Probability TrendNot Available

    CZ-6A DEBCollision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with IRIDIUM 121

    No nearby objects data