Conjunction Event Detail

    ✅
    Low Risk
    Low collision probability. Continue monitoring.
    1.761723E-6
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-10-09T20:35:59+0800
    View CDM
    Download CDM 1.0

    1 Object 1

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

    2 Object 2

    AOE ID 48557
    NORAD ID 48557
    Object Type PAYLOAD
    Country
    US US

    Conjunction Constraints

    Parameter USA 18 STARLINK-2155
    Time of Closest Approach 2026-10-09T14:47:34+0000
    Collision Probability (Pc) 1.761723E-6
    Conjunction Distance (km) 2.372 km
    Relative Speed (km/s) 12.61 km/s
    Conjunction Risk Parameters R (Radial): 0.73 | I (In-track): 1.281 | C (Cross-track): 1.858
    Collision Risk Index (CRI) 0.4
    X Position (km) -3853.101 -3851.8
    Position Y (km) -4865.621 -4867.598
    Position Z (km) 2887.093 2887.227
    Velocity X (km/s) 1.074 5.462
    Velocity Y (km/s) -4.914 -1.231
    Velocity Z (km/s) -6.044 5.189

    Orbital Parameters 国际轨道数据源

    Parameter USA 18 STARLINK-2155
    Semimajor Axis (a) 7293.210 km 6848.815 km
    Eccentricity (e) 0.074206 0.000156
    Inclination (i) 63.2944° 53.1609°
    RAAN 67.4781° 213.0866°
    Perigee Argument 114.7410° 114.5648°
    Mean Anomaly (M) 253.2703° 245.5517°
    Apogee 1456.271 km 471.747 km
    Perigee 373.875 km 469.609 km
    Orbit Epoch 2026-10-08T19:11:21+0000 2026-10-09T05:15:31+0000

    USA 18 & STARLINK-2155 Collision Probability (Pc) Trend

    USA 18 & STARLINK-2155 Collision Probability (Pc) TrendNot Available

    USA 18 & STARLINK-2155 Miss Distance (Miss Distance) Trend

    USA 18 & STARLINK-2155 Miss Distance (Miss Distance) TrendNot Available

    USA 18Miss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    STARLINK-2155Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    USA 18Collision Probability Trend

    Object 1 Probability TrendNot Available

    STARLINK-2155Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with USA 18

    No nearby objects data