Conjunction Event Detail

    Very Low Risk
    Very low collision probability. Continue monitoring.
    4.193321E-7
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-09-16T06:49:49+0800
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    1 Object 1

    Name ALOS 2
    AOE ID 39766
    NORAD ID 39766
    Object Type PAYLOAD
    Country
    JP JP
    VS

    2 Object 2

    AOE ID 56730
    NORAD ID 56730
    Object Type PAYLOAD
    Country
    US US

    Conjunction Constraints

    Parameter ALOS 2 IRIDIUM 179
    Time of Closest Approach 2026-09-17T21:33:40+0000
    Collision Probability (Pc) 4.193321E-7
    Conjunction Distance (km) 2.948 km
    Relative Speed (km/s) 1.48 km/s
    Conjunction Risk Parameters R (Radial): -1.527 | I (In-track): -2.509 | C (Cross-track): -0.241
    Collision Risk Index (CRI) 0.27
    X Position (km) -6977.606 -6976.28
    Position Y (km) 470.712 470.514
    Position Z (km) -520.603 -517.977
    Velocity X (km/s) 0.615 0.516
    Velocity Y (km/s) 1.002 -0.473
    Velocity Z (km/s) -7.448 -7.509

    Orbital Parameters 国际轨道数据源

    Parameter ALOS 2 IRIDIUM 179
    Semimajor Axis (a) 7009.141 km 7007.298 km
    Eccentricity (e) 0.000146 0.000237
    Inclination (i) 97.9230° 86.6838°
    RAAN 354.4341° 356.9733°
    Perigee Argument 94.6637° 91.0967°
    Mean Anomaly (M) 265.4741° 269.0525°
    Apogee 632.026 km 630.819 km
    Perigee 629.982 km 627.503 km
    Orbit Epoch 2026-09-15T13:32:35+0000 2026-09-15T07:04:20+0000

    ALOS 2 & IRIDIUM 179 Collision Probability (Pc) Trend

    ALOS 2 & IRIDIUM 179 Collision Probability (Pc) TrendNot Available

    ALOS 2 & IRIDIUM 179 Miss Distance (Miss Distance) Trend

    ALOS 2 & IRIDIUM 179 Miss Distance (Miss Distance) TrendNot Available

    ALOS 2Miss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    IRIDIUM 179Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    ALOS 2Collision Probability Trend

    Object 1 Probability TrendNot Available

    IRIDIUM 179Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with ALOS 2

    No nearby objects data