Conjunction Event Detail

    ✅
    Low Risk
    Low collision probability. Continue monitoring.
    6.5445E-6
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-10-20T05:22:31+0800
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    1 Object 1

    Name USA 18
    AOE ID 16631
    NORAD ID 16631
    Object Type PAYLOAD
    Country
    US US
    ← VS →

    2 Object 2

    AOE ID 59573
    NORAD ID 59573
    Object Type PAYLOAD
    Country
    US US

    Conjunction Constraints

    Parameter USA 18 STARLINK-31683
    Time of Closest Approach 2026-10-21T16:02:29+0000
    Collision Probability (Pc) 6.5445E-6
    Conjunction Distance (km) 1.441 km
    Relative Speed (km/s) 11.733 km/s
    Conjunction Risk Parameters R (Radial): 1.376 | I (In-track): 0.311 | C (Cross-track): -0.291
    Collision Risk Index (CRI) 0.51
    X Position (km) -5991.885 -5990.806
    Position Y (km) -2066.232 -2065.412
    Position Z (km) 2622.25 2621.762
    Velocity X (km/s) -1.547 3.658
    Velocity Y (km/s) -4.565 -5.124
    Velocity Z (km/s) -6.194 4.307

    Orbital Parameters 国际轨道数据源

    Parameter USA 18 STARLINK-31683
    Semimajor Axis (a) 7292.536 km 6861.191 km
    Eccentricity (e) 0.074075 0.000125
    Inclination (i) 63.2962° 43.0031°
    RAAN 37.8265° 187.4786°
    Perigee Argument 114.9369° 274.5605°
    Mean Anomaly (M) 253.0490° 85.5104°
    Apogee 1454.591 km 483.910 km
    Perigee 374.207 km 482.198 km
    Orbit Epoch 2026-10-19T06:33:16+0000 2026-10-19T01:07:21+0000

    USA 18 & STARLINK-31683 Collision Probability (Pc) Trend

    USA 18 & STARLINK-31683 Collision Probability (Pc) TrendNot Available

    USA 18 & STARLINK-31683 Miss Distance (Miss Distance) Trend

    USA 18 & STARLINK-31683 Miss Distance (Miss Distance) TrendNot Available

    USA 18Miss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    STARLINK-31683Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    USA 18Collision Probability Trend

    Object 1 Probability TrendNot Available

    STARLINK-31683Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with USA 18

    No nearby objects data