Conjunction Event Detail

    Low Risk
    Low collision probability. Continue monitoring.
    6.208756E-6
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-09-15T22:43:02+0800
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    1 Object 1

    AOE ID 34946
    NORAD ID 34946
    Object Type DEBRIS
    Country
    CIS CIS
    VS

    2 Object 2

    AOE ID 39084
    NORAD ID 39084
    Object Type PAYLOAD
    Country
    US US

    Conjunction Constraints

    Parameter COSMOS 2251 DEB LANDSAT 8
    Time of Closest Approach 2026-09-17T22:43:47+0000
    Collision Probability (Pc) 6.208756E-6
    Conjunction Distance (km) 1.536 km
    Relative Speed (km/s) 14.819 km/s
    Conjunction Risk Parameters R (Radial): -1.53 | I (In-track): -0.005 | C (Cross-track): 0.134
    Collision Risk Index (CRI) 0.51
    X Position (km) 2343.03 2343.598
    Position Y (km) -2396.615 -2397.017
    Position Z (km) 6227.654 6229.023
    Velocity X (km/s) 6.861 -6.027
    Velocity Y (km/s) -0.787 2.924
    Velocity Z (km/s) -2.917 3.385

    Orbital Parameters 国际轨道数据源

    Parameter COSMOS 2251 DEB LANDSAT 8
    Semimajor Axis (a) 7060.639 km 7080.691 km
    Eccentricity (e) 0.005170 0.000132
    Inclination (i) 74.0233° 98.2220°
    RAAN 173.9043° 327.2843°
    Perigee Argument 241.8298° 94.9640°
    Mean Anomaly (M) 117.7641° 265.1709°
    Apogee 719.006 km 703.489 km
    Perigee 645.998 km 701.619 km
    Orbit Epoch 2026-09-14T02:19:26+0000 2026-09-15T06:10:02+0000

    COSMOS 2251 DEB & LANDSAT 8 Collision Probability (Pc) Trend

    COSMOS 2251 DEB & LANDSAT 8 Collision Probability (Pc) TrendNot Available

    COSMOS 2251 DEB & LANDSAT 8 Miss Distance (Miss Distance) Trend

    COSMOS 2251 DEB & LANDSAT 8 Miss Distance (Miss Distance) TrendNot Available

    COSMOS 2251 DEBMiss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    LANDSAT 8Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    COSMOS 2251 DEBCollision Probability Trend

    Object 1 Probability TrendNot Available

    LANDSAT 8Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with COSMOS 2251 DEB

    No nearby objects data