Conjunction Event Detail

    ✅
    Low Risk
    Low collision probability. Continue monitoring.
    3.271768E-6
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-10-28T23:56:05+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 68825
    NORAD ID 68825
    Object Type PAYLOAD
    Country
    US US

    Conjunction Constraints

    Parameter SHIYAN 21 (SY-21) STARLINK-37015
    Time of Closest Approach 2026-10-29T14:53:34+0000
    Collision Probability (Pc) 3.271768E-6
    Conjunction Distance (km) 1.874 km
    Relative Speed (km/s) 13.919 km/s
    Conjunction Risk Parameters R (Radial): 1.339 | I (In-track): 0.553 | C (Cross-track): -1.188
    Collision Risk Index (CRI) 0.45
    X Position (km) 5747.032 5748.856
    Position Y (km) -3373.365 -3373.137
    Position Z (km) 1556.326 1555.969
    Velocity X (km/s) 2.386 0.991
    Velocity Y (km/s) 5.962 -1.733
    Velocity Z (km/s) 4.145 -7.368

    Orbital Parameters 国际轨道数据源

    Parameter SHIYAN 21 (SY-21) STARLINK-37015
    Semimajor Axis (a) 6859.139 km 6843.690 km
    Eccentricity (e) 0.002530 0.000212
    Inclination (i) 35.9930° 97.2826°
    RAAN 321.0708° 146.2498°
    Perigee Argument 326.8279° 94.9957°
    Mean Anomaly (M) 33.0869° 265.1528°
    Apogee 498.353 km 467.006 km
    Perigee 463.651 km 464.100 km
    Orbit Epoch 2026-10-27T23:35:48+0000 2026-10-27T23:00:57+0000

    SHIYAN 21 (SY-21) & STARLINK-37015 Collision Probability (Pc) Trend

    SHIYAN 21 (SY-21) & STARLINK-37015 Collision Probability (Pc) TrendNot Available

    SHIYAN 21 (SY-21) & STARLINK-37015 Miss Distance (Miss Distance) Trend

    SHIYAN 21 (SY-21) & STARLINK-37015 Miss Distance (Miss Distance) TrendNot Available

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

    Object 1 Miss Distance TrendNot Available

    STARLINK-37015Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    SHIYAN 21 (SY-21)Collision Probability Trend

    Object 1 Probability TrendNot Available

    STARLINK-37015Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with SHIYAN 21 (SY-21)

    No nearby objects data