Conjunction Event Detail

    Medium Risk
    Monitor closely. Maneuver recommended for primary asset.
    4.551208E-5
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-09-05T18:47:24+0800
    View CDM
    Download CDM 1.0

    1 Object 1

    AOE ID 33984
    NORAD ID 33984
    Object Type DEBRIS
    Country
    CIS CIS
    VS

    2 Object 2

    Name LYRA-4
    AOE ID 64691
    NORAD ID 64691
    Object Type PAYLOAD
    Country
    AU AU

    Conjunction Constraints

    Parameter COSMOS 2251 DEB LYRA-4
    Time of Closest Approach 2026-09-07T13:12:11+0000
    Collision Probability (Pc) 4.551208E-5
    Conjunction Distance (km) 0.858 km
    Relative Speed (km/s) 14.828 km/s
    Conjunction Risk Parameters R (Radial): -0.415 | I (In-track): 0.13 | C (Cross-track): -0.739
    Collision Risk Index (CRI) 0.68
    X Position (km) -3522.189 -3522.005
    Position Y (km) 1286.161 1285.349
    Position Z (km) -5951.33 -5951.123
    Velocity X (km/s) -6.455 6.372
    Velocity Y (km/s) -1.787 -0.752
    Velocity Z (km/s) 3.439 -3.927

    Orbital Parameters 国际轨道数据源

    Parameter COSMOS 2251 DEB LYRA-4
    Semimajor Axis (a) 7044.067 km 7030.704 km
    Eccentricity (e) 0.002399 0.001081
    Inclination (i) 74.0076° 96.0096°
    RAAN 191.5887° 347.8321°
    Perigee Argument 312.4595° 302.8251°
    Mean Anomaly (M) 111.0512° 57.1919°
    Apogee 682.829 km 660.171 km
    Perigee 649.031 km 644.963 km
    Orbit Epoch 2026-09-05T04:32:44+0000 2026-09-05T04:40:44+0000

    COSMOS 2251 DEB & LYRA-4 Collision Probability (Pc) Trend

    COSMOS 2251 DEB & LYRA-4 Collision Probability (Pc) TrendNot Available

    COSMOS 2251 DEB & LYRA-4 Miss Distance (Miss Distance) Trend

    COSMOS 2251 DEB & LYRA-4 Miss Distance (Miss Distance) TrendNot Available

    COSMOS 2251 DEBMiss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    LYRA-4Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    COSMOS 2251 DEBCollision Probability Trend

    Object 1 Probability TrendNot Available

    LYRA-4Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with COSMOS 2251 DEB

    No nearby objects data