Conjunction Event Detail

    Low Risk
    Low collision probability. Continue monitoring.
    1.293052E-6
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-09-02T21:32:52+0800
    View CDM
    Download CDM 1.0

    1 Object 1

    AOE ID 53777
    NORAD ID 53777
    Object Type PAYLOAD
    Country
    US US
    VS

    2 Object 2

    Name SEMI-1L
    AOE ID 66294
    NORAD ID 66294
    Object Type PAYLOAD
    Country
    TR TR

    Conjunction Constraints

    Parameter STARLINK-4664 SEMI-1L
    Time of Closest Approach 2026-09-03T00:27:11+0000
    Collision Probability (Pc) 1.293052E-6
    Conjunction Distance (km) 2.673 km
    Relative Speed (km/s) 10.62 km/s
    Conjunction Risk Parameters R (Radial): -1.984 | I (In-track): -1.275 | C (Cross-track): -1.256
    Collision Risk Index (CRI) 0.37
    X Position (km) -5002.491 -5002.813
    Position Y (km) -3755.996 -3758.468
    Position Z (km) 2844.197 2845.161
    Velocity X (km/s) 4.917 1.92
    Velocity Y (km/s) -2.583 -5.907
    Velocity Z (km/s) 5.217 -4.414

    Orbital Parameters 国际轨道数据源

    Parameter STARLINK-4664 SEMI-1L
    Semimajor Axis (a) 6875.909 km 6878.843 km
    Eccentricity (e) 0.000214 0.000276
    Inclination (i) 53.1613° 45.4056°
    RAAN 200.5031° 69.7103°
    Perigee Argument 73.3811° 179.4657°
    Mean Anomaly (M) 60.7985° 180.6233°
    Apogee 499.244 km 502.604 km
    Perigee 496.300 km 498.808 km
    Orbit Epoch 2026-09-02T06:00:02+0000 2026-09-01T21:02:13+0000

    STARLINK-4664 & SEMI-1L Collision Probability (Pc) Trend

    STARLINK-4664 & SEMI-1L Collision Probability (Pc) TrendNot Available

    STARLINK-4664 & SEMI-1L Miss Distance (Miss Distance) Trend

    STARLINK-4664 & SEMI-1L Miss Distance (Miss Distance) TrendNot Available

    STARLINK-4664Miss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    SEMI-1LMiss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    STARLINK-4664Collision Probability Trend

    Object 1 Probability TrendNot Available

    SEMI-1LCollision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with STARLINK-4664

    No nearby objects data