Conjunction Event Detail

    ✅
    Low Risk
    Low collision probability. Continue monitoring.
    1.73544E-6
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-10-31T12:41:15+0800
    View CDM
    Download CDM 1.0

    1 Object 1

    AOE ID 20876
    NORAD ID 20876
    Object Type DEBRIS
    Country
    CN CN
    ← VS →

    2 Object 2

    AOE ID 56726
    NORAD ID 56726
    Object Type PAYLOAD
    Country
    US US

    Conjunction Constraints

    Parameter CZ-4 DEB IRIDIUM 181
    Time of Closest Approach 2026-10-31T21:55:00+0000
    Collision Probability (Pc) 1.73544E-6
    Conjunction Distance (km) 2.007 km
    Relative Speed (km/s) 6.728 km/s
    Conjunction Risk Parameters R (Radial): -0.565 | I (In-track): -1.721 | C (Cross-track): 0.863
    Collision Risk Index (CRI) 0.4
    X Position (km) -1632.135 -1633.935
    Position Y (km) 437.529 438.411
    Position Z (km) 6912.908 6913.008
    Velocity X (km/s) -4.309 -7.283
    Velocity Y (km/s) 5.963 -0.062
    Velocity Z (km/s) -1.393 -1.714

    Orbital Parameters 国际轨道数据源

    Parameter CZ-4 DEB IRIDIUM 181
    Semimajor Axis (a) 7134.456 km 7125.718 km
    Eccentricity (e) 0.001516 0.000235
    Inclination (i) 98.4641° 86.4547°
    RAAN 306.4932° 0.3873°
    Perigee Argument 107.4822° 92.9917°
    Mean Anomaly (M) 313.5508° 267.1552°
    Apogee 767.132 km 749.252 km
    Perigee 745.506 km 745.910 km
    Orbit Epoch 2026-10-30T22:23:47+0000 2026-10-30T03:50:33+0000

    CZ-4 DEB & IRIDIUM 181 Collision Probability (Pc) Trend

    CZ-4 DEB & IRIDIUM 181 Collision Probability (Pc) TrendNot Available

    CZ-4 DEB & IRIDIUM 181 Miss Distance (Miss Distance) Trend

    CZ-4 DEB & IRIDIUM 181 Miss Distance (Miss Distance) TrendNot Available

    CZ-4 DEBMiss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    IRIDIUM 181Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    CZ-4 DEBCollision Probability Trend

    Object 1 Probability TrendNot Available

    IRIDIUM 181Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with CZ-4 DEB

    No nearby objects data