Conjunction Event Detail

    Low Risk
    Low collision probability. Continue monitoring.
    3.550896E-6
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-09-03T09:16:32+0800
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    1 Object 1

    AOE ID 34852
    NORAD ID 34852
    Object Type DEBRIS
    Country
    CIS CIS
    VS

    2 Object 2

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

    Conjunction Constraints

    Parameter COSMOS 2251 DEB IRIDIUM 121
    Time of Closest Approach 2026-09-04T04:15:14+0000
    Collision Probability (Pc) 3.550896E-6
    Conjunction Distance (km) 1.842 km
    Relative Speed (km/s) 14.689 km/s
    Conjunction Risk Parameters R (Radial): 1.674 | I (In-track): -0.125 | C (Cross-track): -0.758
    Collision Risk Index (CRI) 0.46
    X Position (km) -5225.819 -5225.109
    Position Y (km) 4447.933 4446.325
    Position Z (km) 2034.636 2034.088
    Velocity X (km/s) 0.169 -1.937
    Velocity Y (km/s) -2.953 1.007
    Velocity Z (km/s) 6.847 -7.139

    Orbital Parameters 国际轨道数据源

    Parameter COSMOS 2251 DEB IRIDIUM 121
    Semimajor Axis (a) 7146.015 km 7155.797 km
    Eccentricity (e) 0.001670 0.000218
    Inclination (i) 74.0332° 86.4002°
    RAAN 139.8541° 321.3273°
    Perigee Argument 187.2533° 94.0206°
    Mean Anomaly (M) 172.8382° 266.1239°
    Apogee 779.810 km 779.220 km
    Perigee 755.946 km 776.100 km
    Orbit Epoch 2026-09-01T09:20:56+0000 2026-09-02T14:39:26+0000

    COSMOS 2251 DEB & IRIDIUM 121 Collision Probability (Pc) Trend

    COSMOS 2251 DEB & IRIDIUM 121 Collision Probability (Pc) TrendNot Available

    COSMOS 2251 DEB & IRIDIUM 121 Miss Distance (Miss Distance) Trend

    COSMOS 2251 DEB & IRIDIUM 121 Miss Distance (Miss Distance) TrendNot Available

    COSMOS 2251 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

    COSMOS 2251 DEBCollision Probability Trend

    Object 1 Probability TrendNot Available

    IRIDIUM 121Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with COSMOS 2251 DEB

    No nearby objects data