Conjunction Event Detail

    ✅
    Low Risk
    Low collision probability. Continue monitoring.
    2.458514E-6
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-10-20T05:08:39+0800
    View CDM
    Download CDM 1.0

    1 Object 1

    AOE ID 33765
    NORAD ID 33765
    Object Type DEBRIS
    Country
    CIS CIS
    ← VS →

    2 Object 2

    Name PTD-4
    AOE ID 60565
    NORAD ID 60565
    Object Type PAYLOAD
    Country
    US US

    Conjunction Constraints

    Parameter COSMOS 2251 DEB PTD-4
    Time of Closest Approach 2026-10-21T21:38:31+0000
    Collision Probability (Pc) 2.458514E-6
    Conjunction Distance (km) 2.127 km
    Relative Speed (km/s) 14.806 km/s
    Conjunction Risk Parameters R (Radial): 1.785 | I (In-track): 0.265 | C (Cross-track): -1.125
    Collision Risk Index (CRI) 0.43
    X Position (km) 2505.388 2505.461
    Position Y (km) 318.481 317.53
    Position Z (km) 6376.295 6374.394
    Velocity X (km/s) 3.923 -6.202
    Velocity Y (km/s) 6.245 -3.58
    Velocity Z (km/s) -1.876 2.612

    Orbital Parameters 国际轨道数据源

    Parameter COSMOS 2251 DEB PTD-4
    Semimajor Axis (a) 6844.724 km 6863.342 km
    Eccentricity (e) 0.004541 0.000187
    Inclination (i) 73.9975° 97.6927°
    RAAN 238.7534° 24.2549°
    Perigee Argument 244.1955° 341.4122°
    Mean Anomaly (M) 115.4561° 18.7047°
    Apogee 497.672 km 486.490 km
    Perigee 435.502 km 483.920 km
    Orbit Epoch 2026-10-19T12:48:28+0000 2026-10-19T01:42:30+0000

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

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

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

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

    COSMOS 2251 DEBMiss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    PTD-4Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    COSMOS 2251 DEBCollision Probability Trend

    Object 1 Probability TrendNot Available

    PTD-4Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with COSMOS 2251 DEB

    No nearby objects data