Conjunction Event Detail

    ✅
    Low Risk
    Low collision probability. Continue monitoring.
    2.936188E-6
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-10-22T04:57:45+0800
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    1 Object 1

    AOE ID 42808
    NORAD ID 42808
    Object Type PAYLOAD
    Country
    US US
    ← VS →

    2 Object 2

    AOE ID 57491
    NORAD ID 57491
    Object Type ROCKET BODY
    Country
    CN CN

    Conjunction Constraints

    Parameter IRIDIUM 117 CZ-4C R/B
    Time of Closest Approach 2026-10-22T07:00:24+0000
    Collision Probability (Pc) 2.936188E-6
    Conjunction Distance (km) 1.953 km
    Relative Speed (km/s) 13.997 km/s
    Conjunction Risk Parameters R (Radial): 1.44 | I (In-track): -0.448 | C (Cross-track): 1.242
    Collision Risk Index (CRI) 0.44
    X Position (km) -988.013 -989.5
    Position Y (km) 802.071 801.988
    Position Z (km) -7050.87 -7052.133
    Velocity X (km/s) 3.657 1.208
    Velocity Y (km/s) -6.369 7.272
    Velocity Z (km/s) -1.237 0.718

    Orbital Parameters 国际轨道数据源

    Parameter IRIDIUM 117 CZ-4C R/B
    Semimajor Axis (a) 7155.805 km 7079.882 km
    Eccentricity (e) 0.000218 0.013738
    Inclination (i) 86.3926° 98.8433°
    RAAN 300.9017° 80.2127°
    Perigee Argument 91.3486° 63.4772°
    Mean Anomaly (M) 268.7959° 298.0436°
    Apogee 779.228 km 799.008 km
    Perigee 776.108 km 604.482 km
    Orbit Epoch 2026-10-21T06:21:15+0000 2026-10-21T03:23:08+0000

    IRIDIUM 117 & CZ-4C R/B Collision Probability (Pc) Trend

    IRIDIUM 117 & CZ-4C R/B Collision Probability (Pc) TrendNot Available

    IRIDIUM 117 & CZ-4C R/B Miss Distance (Miss Distance) Trend

    IRIDIUM 117 & CZ-4C R/B Miss Distance (Miss Distance) TrendNot Available

    IRIDIUM 117Miss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    CZ-4C R/BMiss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    IRIDIUM 117Collision Probability Trend

    Object 1 Probability TrendNot Available

    CZ-4C R/BCollision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with IRIDIUM 117

    No nearby objects data