Conjunction Event Detail

    High Risk
    High collision probability. Maneuver recommended for primary asset.
    1.203943E-4
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-09-04T11:55:44+0800
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    1 Object 1

    Name USA 55
    AOE ID 20547
    NORAD ID 20547
    Object Type PAYLOAD
    Country
    US US
    VS

    2 Object 2

    AOE ID 48568
    NORAD ID 48568
    Object Type PAYLOAD
    Country
    US US

    Conjunction Constraints

    Parameter USA 55 STARLINK-2217
    Time of Closest Approach 2026-09-05T15:18:52+0000
    Collision Probability (Pc) 1.203943E-4
    Conjunction Distance (km) 0.618 km
    Relative Speed (km/s) 14.624 km/s
    Conjunction Risk Parameters R (Radial): 0.064 | I (In-track): -0.165 | C (Cross-track): 0.592
    Collision Risk Index (CRI) 0.77
    X Position (km) -6768.171 -6768.326
    Position Y (km) -1040.72 -1040.159
    Position Z (km) 156.505 156.299
    Velocity X (km/s) 0.098 0.55
    Velocity Y (km/s) 0.565 -4.544
    Velocity Z (km/s) 7.588 -6.106

    Orbital Parameters 国际轨道数据源

    Parameter USA 55 STARLINK-2217
    Semimajor Axis (a) 6809.881 km 6848.830 km
    Eccentricity (e) 0.005379 0.000095
    Inclination (i) 94.0952° 53.1594°
    RAAN 187.8110° 20.1996°
    Perigee Argument 187.8301° 72.5061°
    Mean Anomaly (M) 172.2121° 287.6044°
    Apogee 468.378 km 471.342 km
    Perigee 395.110 km 470.044 km
    Orbit Epoch 2026-09-03T19:46:48+0000 2026-09-03T09:17:47+0000

    USA 55 & STARLINK-2217 Collision Probability (Pc) Trend

    USA 55 & STARLINK-2217 Collision Probability (Pc) TrendNot Available

    USA 55 & STARLINK-2217 Miss Distance (Miss Distance) Trend

    USA 55 & STARLINK-2217 Miss Distance (Miss Distance) TrendNot Available

    USA 55Miss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    STARLINK-2217Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    USA 55Collision Probability Trend

    Object 1 Probability TrendNot Available

    STARLINK-2217Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with USA 55

    No nearby objects data