Conjunction Event Detail

    Low Risk
    Low collision probability. Continue monitoring.
    7.543479E-6
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-09-05T14:12:20+0800
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    1 Object 1

    Name ALOS
    AOE ID 28931
    NORAD ID 28931
    Object Type PAYLOAD
    Country
    JP JP
    VS

    2 Object 2

    Name LYRA-4
    AOE ID 64691
    NORAD ID 64691
    Object Type PAYLOAD
    Country
    AU AU

    Conjunction Constraints

    Parameter ALOS LYRA-4
    Time of Closest Approach 2026-09-06T23:34:49+0000
    Collision Probability (Pc) 7.543479E-6
    Conjunction Distance (km) 1.436 km
    Relative Speed (km/s) 14.2 km/s
    Conjunction Risk Parameters R (Radial): -1.283 | I (In-track): 0.224 | C (Cross-track): -0.602
    Collision Risk Index (CRI) 0.53
    X Position (km) -2606.069 -2606.454
    Position Y (km) -200.196 -200.869
    Position Z (km) 6526.484 6527.692
    Velocity X (km/s) 6.225 -6.846
    Velocity Y (km/s) 3.355 1.598
    Velocity Z (km/s) 2.583 -2.678

    Orbital Parameters 国际轨道数据源

    Parameter ALOS LYRA-4
    Semimajor Axis (a) 7038.581 km 7030.707 km
    Eccentricity (e) 0.000218 0.001084
    Inclination (i) 98.1399° 96.0096°
    RAAN 202.6712° 347.4798°
    Perigee Argument 85.3419° 304.6544°
    Mean Anomaly (M) 274.8035° 55.3647°
    Apogee 661.977 km 660.189 km
    Perigee 658.911 km 644.951 km
    Orbit Epoch 2026-09-04T07:33:42+0000 2026-09-04T17:15:50+0000

    ALOS & LYRA-4 Collision Probability (Pc) Trend

    ALOS & LYRA-4 Collision Probability (Pc) TrendNot Available

    ALOS & LYRA-4 Miss Distance (Miss Distance) Trend

    ALOS & LYRA-4 Miss Distance (Miss Distance) TrendNot Available

    ALOSMiss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    LYRA-4Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    ALOSCollision Probability Trend

    Object 1 Probability TrendNot Available

    LYRA-4Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with ALOS

    No nearby objects data