Conjunction Event Detail

    Low Risk
    Low collision probability. Continue monitoring.
    1.369488E-6
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-09-05T06:31:06+0800
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    1 Object 1

    AOE ID 34128
    NORAD ID 34128
    Object Type DEBRIS
    Country
    CIS CIS
    VS

    2 Object 2

    AOE ID 60541
    NORAD ID 60541
    Object Type PAYLOAD
    Country
    US US

    Conjunction Constraints

    Parameter COSMOS 2251 DEB UMBRA-09
    Time of Closest Approach 2026-09-04T22:59:51+0000
    Collision Probability (Pc) 1.369488E-6
    Conjunction Distance (km) 2.846 km
    Relative Speed (km/s) 13.697 km/s
    Conjunction Risk Parameters R (Radial): 2.827 | I (In-track): 0.137 | C (Cross-track): 0.303
    Collision Risk Index (CRI) 0.38
    X Position (km) 1929.79 1930.828
    Position Y (km) 140.424 140.689
    Position Z (km) -6617.62 -6620.257
    Velocity X (km/s) -1.846 6.649
    Velocity Y (km/s) 7.352 -3.148
    Velocity Z (km/s) -0.401 1.873

    Orbital Parameters 国际轨道数据源

    Parameter COSMOS 2251 DEB UMBRA-09
    Semimajor Axis (a) 6882.725 km 6889.841 km
    Eccentricity (e) 0.002398 0.000072
    Inclination (i) 73.9865° 97.6939°
    RAAN 105.7523° 334.5684°
    Perigee Argument 159.8570° 90.2882°
    Mean Anomaly (M) 224.7647° 269.8433°
    Apogee 521.091 km 512.199 km
    Perigee 488.085 km 511.209 km
    Orbit Epoch 2026-09-04T14:02:23+0000 2026-09-02T22:17:23+0000

    COSMOS 2251 DEB & UMBRA-09 Collision Probability (Pc) Trend

    COSMOS 2251 DEB & UMBRA-09 Collision Probability (Pc) TrendNot Available

    COSMOS 2251 DEB & UMBRA-09 Miss Distance (Miss Distance) Trend

    COSMOS 2251 DEB & UMBRA-09 Miss Distance (Miss Distance) TrendNot Available

    COSMOS 2251 DEBMiss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    UMBRA-09Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    COSMOS 2251 DEBCollision Probability Trend

    Object 1 Probability TrendNot Available

    UMBRA-09Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with COSMOS 2251 DEB

    No nearby objects data