Conjunction Event Detail

    Very Low Risk
    Very low collision probability. Continue monitoring.
    8.884396E-7
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-09-04T16:40:06+0800
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    1 Object 1

    AOE ID 52679
    NORAD ID 52679
    Object Type PAYLOAD
    Country
    US US
    VS

    2 Object 2

    AOE ID 57728
    NORAD ID 57728
    Object Type PAYLOAD
    Country
    CN CN

    Conjunction Constraints

    Parameter STARLINK-4031 YAOGAN-39 01B
    Time of Closest Approach 2026-09-05T21:06:35+0000
    Collision Probability (Pc) 8.884396E-7
    Conjunction Distance (km) 2.511 km
    Relative Speed (km/s) 4.603 km/s
    Conjunction Risk Parameters R (Radial): 2.164 | I (In-track): 1.214 | C (Cross-track): -0.386
    Collision Risk Index (CRI) 0.34
    X Position (km) -501.287 -502.297
    Position Y (km) -5694.855 -5693.281
    Position Z (km) -3870.048 -3868.373
    Velocity X (km/s) 5.736 7.54
    Velocity Y (km/s) 2.441 -0.046
    Velocity Z (km/s) -4.341 -0.914

    Orbital Parameters 国际轨道数据源

    Parameter STARLINK-4031 YAOGAN-39 01B
    Semimajor Axis (a) 6898.899 km 6893.389 km
    Eccentricity (e) 0.000169 0.000873
    Inclination (i) 53.1605° 34.9951°
    RAAN 62.2478° 22.6183°
    Perigee Argument 96.0798° 62.1893°
    Mean Anomaly (M) 140.6437° 297.9704°
    Apogee 521.928 km 521.271 km
    Perigee 519.596 km 509.233 km
    Orbit Epoch 2026-09-04T04:00:02+0000 2026-09-03T19:00:42+0000

    STARLINK-4031 & YAOGAN-39 01B Collision Probability (Pc) Trend

    STARLINK-4031 & YAOGAN-39 01B Collision Probability (Pc) TrendNot Available

    STARLINK-4031 & YAOGAN-39 01B Miss Distance (Miss Distance) Trend

    STARLINK-4031 & YAOGAN-39 01B Miss Distance (Miss Distance) TrendNot Available

    STARLINK-4031Miss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    YAOGAN-39 01BMiss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    STARLINK-4031Collision Probability Trend

    Object 1 Probability TrendNot Available

    YAOGAN-39 01BCollision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with STARLINK-4031

    No nearby objects data