Conjunction Event Detail

    ⚠
    High Risk
    High collision probability. Maneuver recommended for primary asset.
    1.916205E-4
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-11-03T19:56:44+0800
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    1 Object 1

    Name USA 77
    AOE ID 21809
    NORAD ID 21809
    Object Type PAYLOAD
    Country
    US US
    ← VS →

    2 Object 2

    AOE ID 68598
    NORAD ID 68598
    Object Type PAYLOAD
    Country
    US US

    Conjunction Constraints

    Parameter USA 77 KUIPER-00301
    Time of Closest Approach 2026-11-05T01:52:39+0000
    Collision Probability (Pc) 1.916205E-4
    Conjunction Distance (km) 0.474 km
    Relative Speed (km/s) 10.713 km/s
    Conjunction Risk Parameters R (Radial): -0.452 | I (In-track): -0.119 | C (Cross-track): 0.073
    Collision Risk Index (CRI) 0.81
    X Position (km) 2272.71 2272.98
    Position Y (km) -4781.829 -4782.072
    Position Z (km) 4581.739 4582.043
    Velocity X (km/s) 6.08 4.336
    Velocity Y (km/s) -2.08 5.226
    Velocity Z (km/s) -4.343 3.294

    Orbital Parameters 国际轨道数据源

    Parameter USA 77 KUIPER-00301
    Semimajor Axis (a) 7423.334 km 7007.630 km
    Eccentricity (e) 0.089886 0.000080
    Inclination (i) 63.2932° 51.9013°
    RAAN 147.2199° 264.0617°
    Perigee Argument 77.3271° 74.8577°
    Mean Anomaly (M) 292.6630° 277.7319°
    Apogee 1712.451 km 630.056 km
    Perigee 377.943 km 628.930 km
    Orbit Epoch 2026-11-02T20:16:19+0000 2026-11-02T12:00:03+0000

    USA 77 & KUIPER-00301 Collision Probability (Pc) Trend

    USA 77 & KUIPER-00301 Collision Probability (Pc) TrendNot Available

    USA 77 & KUIPER-00301 Miss Distance (Miss Distance) Trend

    USA 77 & KUIPER-00301 Miss Distance (Miss Distance) TrendNot Available

    USA 77Miss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    KUIPER-00301Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    USA 77Collision Probability Trend

    Object 1 Probability TrendNot Available

    KUIPER-00301Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with USA 77

    No nearby objects data