Conjunction Event Detail

    ✅
    Low Risk
    Low collision probability. Continue monitoring.
    1.352631E-6
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-10-20T13:08:12+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 2026-10-21T21:38:32+0000
    Collision Probability (Pc) 1.352631E-6
    Conjunction Distance (km) 2.976 km
    Relative Speed (km/s) 14.806 km/s
    Conjunction Risk Parameters R (Radial): -1.75 | I (In-track): -0.563 | C (Cross-track): -2.339
    Collision Risk Index (CRI) 0.38
    X Position (km) 2506.718 2507.598
    Position Y (km) 320.598 318.721
    Position Z (km) 6375.658 6373.523
    Velocity X (km/s) 3.922 -6.201
    Velocity Y (km/s) 6.245 -3.58
    Velocity Z (km/s) -1.879 2.615

    Orbital Parameters 国际轨道数据源

    Parameter COSMOS 2251 DEB PTD-4
    Semimajor Axis (a) 6844.724 km 6863.247 km
    Eccentricity (e) 0.004541 0.000181
    Inclination (i) 73.9975° 97.6929°
    RAAN 238.7534° 24.9297°
    Perigee Argument 244.1955° 338.2630°
    Mean Anomaly (M) 115.4561° 21.8531°
    Apogee 497.672 km 486.352 km
    Perigee 435.502 km 483.868 km
    Orbit Epoch 2026-10-19T12:48:28+0000 2026-10-19T17:26:12+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