Conjunction Event Detail

    ⚠
    Medium Risk
    Monitor closely. Maneuver recommended for primary asset.
    1.030691E-5
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-10-30T18:58:43+0800
    View CDM
    Download CDM 1.0

    1 Object 1

    Name USA 121
    AOE ID 23908
    NORAD ID 23908
    Object Type PAYLOAD
    Country
    US US
    ← VS →

    2 Object 2

    AOE ID 37735
    NORAD ID 37735
    Object Type DEBRIS
    Country
    CN CN

    Conjunction Constraints

    Parameter USA 121 CZ-2C DEB
    Time of Closest Approach 2026-11-01T14:53:04+0000
    Collision Probability (Pc) 1.030691E-5
    Conjunction Distance (km) 1.196 km
    Relative Speed (km/s) 9.063 km/s
    Conjunction Risk Parameters R (Radial): 0.155 | I (In-track): -0.946 | C (Cross-track): -0.713
    Collision Risk Index (CRI) 0.55
    X Position (km) -1733.198 -1734.007
    Position Y (km) -3305.581 -3306.316
    Position Z (km) 5734.974 5734.49
    Velocity X (km/s) 7.493 1.037
    Velocity Y (km/s) 0.214 6.418
    Velocity Z (km/s) 2.617 4.014

    Orbital Parameters 国际轨道数据源

    Parameter USA 121 CZ-2C DEB
    Semimajor Axis (a) 7462.832 km 6864.962 km
    Eccentricity (e) 0.085816 0.002528
    Inclination (i) 63.3165° 98.4659°
    RAAN 199.3506° 252.1242°
    Perigee Argument 51.6019° 46.4106°
    Mean Anomaly (M) 315.8960° 313.9221°
    Apogee 1725.126 km 504.180 km
    Perigee 444.264 km 469.470 km
    Orbit Epoch 2026-10-29T17:05:03+0000 2026-10-29T14:15:46+0000

    USA 121 & CZ-2C DEB Collision Probability (Pc) Trend

    USA 121 & CZ-2C DEB Collision Probability (Pc) TrendNot Available

    USA 121 & CZ-2C DEB Miss Distance (Miss Distance) Trend

    USA 121 & CZ-2C DEB Miss Distance (Miss Distance) TrendNot Available

    USA 121Miss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    CZ-2C DEBMiss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    USA 121Collision Probability Trend

    Object 1 Probability TrendNot Available

    CZ-2C DEBCollision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with USA 121

    No nearby objects data