Conjunction Event Detail

    Low Risk
    Low collision probability. Continue monitoring.
    2.164738E-6
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-09-11T06:56:56+0800
    View CDM
    Download CDM 1.0

    1 Object 1

    AOE ID 30145
    NORAD ID 30145
    Object Type DEBRIS
    Country
    CN CN
    VS

    2 Object 2

    AOE ID 42812
    NORAD ID 42812
    Object Type PAYLOAD
    Country
    US US

    Conjunction Constraints

    Parameter FENGYUN 1C DEB IRIDIUM 121
    Time of Closest Approach 2026-09-11T08:19:25+0000
    Collision Probability (Pc) 2.164738E-6
    Conjunction Distance (km) 1.908 km
    Relative Speed (km/s) 7.835 km/s
    Conjunction Risk Parameters R (Radial): 0.872 | I (In-track): -1.45 | C (Cross-track): -0.879
    Collision Risk Index (CRI) 0.42
    X Position (km) 1422.123 1420.324
    Position Y (km) -700.2 -699.795
    Position Z (km) 6969.992 6969.506
    Velocity X (km/s) -6.915 -5.328
    Velocity Y (km/s) -2.672 4.986
    Velocity Z (km/s) 1.115 1.583

    Orbital Parameters 国际轨道数据源

    Parameter FENGYUN 1C DEB IRIDIUM 121
    Semimajor Axis (a) 7215.016 km 7155.806 km
    Eccentricity (e) 0.008880 0.000221
    Inclination (i) 99.2754° 86.3990°
    RAAN 18.4799° 318.0340°
    Perigee Argument 105.9529° 94.4215°
    Mean Anomaly (M) 18.6491° 265.7234°
    Apogee 900.951 km 779.253 km
    Perigee 772.807 km 776.085 km
    Orbit Epoch 2026-09-10T03:42:34+0000 2026-09-10T11:52:11+0000

    FENGYUN 1C DEB & IRIDIUM 121 Collision Probability (Pc) Trend

    FENGYUN 1C DEB & IRIDIUM 121 Collision Probability (Pc) TrendNot Available

    FENGYUN 1C DEB & IRIDIUM 121 Miss Distance (Miss Distance) Trend

    FENGYUN 1C DEB & IRIDIUM 121 Miss Distance (Miss Distance) TrendNot Available

    FENGYUN 1C DEBMiss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    IRIDIUM 121Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    FENGYUN 1C DEBCollision Probability Trend

    Object 1 Probability TrendNot Available

    IRIDIUM 121Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with FENGYUN 1C DEB

    No nearby objects data