Conjunction Event Detail

    ⚠
    High Risk
    High collision probability. Maneuver recommended for primary asset.
    2.928805E-4
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-10-20T06:33:06+0800
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    1 Object 1

    AOE ID 54752
    NORAD ID 54752
    Object Type PAYLOAD
    Country
    CN CN
    ← VS →

    2 Object 2

    AOE ID 64952
    NORAD ID 64952
    Object Type PAYLOAD
    Country
    US US

    Conjunction Constraints

    Parameter SHIYAN 21 (SY-21) STARLINK-34744
    Time of Closest Approach 2026-10-20T06:22:12+0000
    Collision Probability (Pc) 2.928805E-4
    Conjunction Distance (km) 0.411 km
    Relative Speed (km/s) 13.482 km/s
    Conjunction Risk Parameters R (Radial): -0.312 | I (In-track): 0.122 | C (Cross-track): 0.236
    Collision Risk Index (CRI) 0.84
    X Position (km) 5207.886 5208.064
    Position Y (km) -3302.442 -3302.811
    Position Z (km) -2981.723 -2981.722
    Velocity X (km/s) 4.916 -3.346
    Velocity Y (km/s) 5.008 0.851
    Velocity Z (km/s) 3.009 -6.8

    Orbital Parameters 国际轨道数据源

    Parameter SHIYAN 21 (SY-21) STARLINK-34744
    Semimajor Axis (a) 6859.458 km 6843.690 km
    Eccentricity (e) 0.002583 0.000157
    Inclination (i) 35.9929° 97.2835°
    RAAN 14.2445° 149.9693°
    Perigee Argument 255.1370° 75.3943°
    Mean Anomaly (M) 104.6503° 284.7473°
    Apogee 499.037 km 466.628 km
    Perigee 463.605 km 464.478 km
    Orbit Epoch 2026-10-19T11:45:44+0000 2026-10-19T01:17:07+0000

    SHIYAN 21 (SY-21) & STARLINK-34744 Collision Probability (Pc) Trend

    SHIYAN 21 (SY-21) & STARLINK-34744 Collision Probability (Pc) TrendNot Available

    SHIYAN 21 (SY-21) & STARLINK-34744 Miss Distance (Miss Distance) Trend

    SHIYAN 21 (SY-21) & STARLINK-34744 Miss Distance (Miss Distance) TrendNot Available

    SHIYAN 21 (SY-21)Miss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    STARLINK-34744Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    SHIYAN 21 (SY-21)Collision Probability Trend

    Object 1 Probability TrendNot Available

    STARLINK-34744Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with SHIYAN 21 (SY-21)

    No nearby objects data