Conjunction Event Detail

    ✅
    Low Risk
    Low collision probability. Continue monitoring.
    5.278125E-6
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-10-25T03:07:51+0800
    View CDM
    Download CDM 1.0

    1 Object 1

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

    2 Object 2

    AOE ID 65058
    NORAD ID 65058
    Object Type PAYLOAD
    Country
    US US

    Conjunction Constraints

    Parameter USA 77 STARLINK-34779
    Time of Closest Approach 2026-10-25T02:03:45+0000
    Collision Probability (Pc) 5.278125E-6
    Conjunction Distance (km) 1.624 km
    Relative Speed (km/s) 15.163 km/s
    Conjunction Risk Parameters R (Radial): 1.277 | I (In-track): -0.193 | C (Cross-track): 0.985
    Collision Risk Index (CRI) 0.49
    X Position (km) -5127.973 -5128.913
    Position Y (km) -1357.158 -1356.46
    Position Z (km) 4316.051 4317.177
    Velocity X (km/s) 5.383 -4.923
    Velocity Y (km/s) -3.323 -0.011
    Velocity Z (km/s) 4.781 -5.836

    Orbital Parameters 国际轨道数据源

    Parameter USA 77 STARLINK-34779
    Semimajor Axis (a) 7423.543 km 6843.668 km
    Eccentricity (e) 0.089877 0.000130
    Inclination (i) 63.2951° 97.2884°
    RAAN 173.4264° 7.9098°
    Perigee Argument 77.1435° 110.5376°
    Mean Anomaly (M) 292.8365° 249.6006°
    Apogee 1712.612 km 466.420 km
    Perigee 378.200 km 464.642 km
    Orbit Epoch 2026-10-24T01:06:39+0000 2026-10-24T03:31:38+0000

    USA 77 & STARLINK-34779 Collision Probability (Pc) Trend

    USA 77 & STARLINK-34779 Collision Probability (Pc) TrendNot Available

    USA 77 & STARLINK-34779 Miss Distance (Miss Distance) Trend

    USA 77 & STARLINK-34779 Miss Distance (Miss Distance) TrendNot Available

    USA 77Miss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    STARLINK-34779Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    USA 77Collision Probability Trend

    Object 1 Probability TrendNot Available

    STARLINK-34779Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with USA 77

    No nearby objects data