Conjunction Event Detail

    ✅
    Low Risk
    Low collision probability. Continue monitoring.
    2.047263E-6
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-10-28T03:26:40+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 67452
    NORAD ID 67452
    Object Type PAYLOAD
    Country
    US US

    Conjunction Constraints

    Parameter SHIYAN 21 (SY-21) STARLINK-36524
    Time of Closest Approach 2026-10-29T06:25:00+0000
    Collision Probability (Pc) 2.047263E-6
    Conjunction Distance (km) 1.381 km
    Relative Speed (km/s) 1.467 km/s
    Conjunction Risk Parameters R (Radial): -0.69 | I (In-track): 1.189 | C (Cross-track): -0.121
    Collision Risk Index (CRI) 0.41
    X Position (km) -5981.128 -5980.192
    Position Y (km) -356.253 -357.256
    Position Z (km) -3349.967 -3350.118
    Velocity X (km/s) 1.826 2.405
    Velocity Y (km/s) -6.966 -6.254
    Velocity Z (km/s) -2.485 -3.628

    Orbital Parameters 国际轨道数据源

    Parameter SHIYAN 21 (SY-21) STARLINK-36524
    Semimajor Axis (a) 6859.160 km 6861.107 km
    Eccentricity (e) 0.002540 0.000148
    Inclination (i) 35.9931° 42.9873°
    RAAN 325.5705° 338.5795°
    Perigee Argument 320.7039° 324.3314°
    Mean Anomaly (M) 39.1852° 35.7438°
    Apogee 498.443 km 483.989 km
    Perigee 463.603 km 481.951 km
    Orbit Epoch 2026-10-27T06:20:58+0000 2026-10-27T03:13:08+0000

    SHIYAN 21 (SY-21) & STARLINK-36524 Collision Probability (Pc) Trend

    SHIYAN 21 (SY-21) & STARLINK-36524 Collision Probability (Pc) TrendNot Available

    SHIYAN 21 (SY-21) & STARLINK-36524 Miss Distance (Miss Distance) Trend

    SHIYAN 21 (SY-21) & STARLINK-36524 Miss Distance (Miss Distance) TrendNot Available

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

    Object 1 Miss Distance TrendNot Available

    STARLINK-36524Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    SHIYAN 21 (SY-21)Collision Probability Trend

    Object 1 Probability TrendNot Available

    STARLINK-36524Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with SHIYAN 21 (SY-21)

    No nearby objects data