Conjunction Event Detail

    Low Risk
    Low collision probability. Continue monitoring.
    1.76412E-6
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-09-16T08:00:49+0800
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    1 Object 1

    AOE ID 41421
    NORAD ID 41421
    Object Type DEBRIS
    Country
    US US
    VS

    2 Object 2

    AOE ID 56728
    NORAD ID 56728
    Object Type PAYLOAD
    Country
    US US

    Conjunction Constraints

    Parameter NOAA 16 DEB IRIDIUM 174
    Time of Closest Approach 2026-09-18T10:17:54+0000
    Collision Probability (Pc) 1.76412E-6
    Conjunction Distance (km) 2.506 km
    Relative Speed (km/s) 15.027 km/s
    Conjunction Risk Parameters R (Radial): -2.273 | I (In-track): 0.07 | C (Cross-track): -1.05
    Collision Risk Index (CRI) 0.4
    X Position (km) -2997.839 -2999.516
    Position Y (km) 3475.276 3475.628
    Position Z (km) 5317.296 5319.124
    Velocity X (km/s) 4.989 -4.231
    Velocity Y (km/s) -3.038 3.859
    Velocity Z (km/s) 4.763 -4.894

    Orbital Parameters 国际轨道数据源

    Parameter NOAA 16 DEB IRIDIUM 174
    Semimajor Axis (a) 7035.075 km 7032.002 km
    Eccentricity (e) 0.002601 0.000267
    Inclination (i) 98.9435° 86.6107°
    RAAN 137.1042° 315.9067°
    Perigee Argument 132.0704° 92.2190°
    Mean Anomaly (M) 228.2718° 267.9333°
    Apogee 675.234 km 655.746 km
    Perigee 638.642 km 651.984 km
    Orbit Epoch 2026-09-14T14:40:20+0000 2026-09-15T14:49:40+0000

    NOAA 16 DEB & IRIDIUM 174 Collision Probability (Pc) Trend

    NOAA 16 DEB & IRIDIUM 174 Collision Probability (Pc) TrendNot Available

    NOAA 16 DEB & IRIDIUM 174 Miss Distance (Miss Distance) Trend

    NOAA 16 DEB & IRIDIUM 174 Miss Distance (Miss Distance) TrendNot Available

    NOAA 16 DEBMiss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    IRIDIUM 174Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    NOAA 16 DEBCollision Probability Trend

    Object 1 Probability TrendNot Available

    IRIDIUM 174Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with NOAA 16 DEB

    No nearby objects data