Conjunction Event Detail

    ✅
    Low Risk
    Low collision probability. Continue monitoring.
    1.970637E-6
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-10-17T17:03:55+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 69153
    NORAD ID 69153
    Object Type PAYLOAD
    Country
    US US

    Conjunction Constraints

    Parameter SHIYAN 21 (SY-21) STARLINK-37374
    Time of Closest Approach 2026-10-17T23:12:49+0000
    Collision Probability (Pc) 1.970637E-6
    Conjunction Distance (km) 1.959 km
    Relative Speed (km/s) 7.512 km/s
    Conjunction Risk Parameters R (Radial): -1.016 | I (In-track): 1.456 | C (Cross-track): -0.828
    Collision Risk Index (CRI) 0.41
    X Position (km) -180.874 -182.514
    Position Y (km) -5723.439 -5724.007
    Position Z (km) -3748.678 -3749.587
    Velocity X (km/s) 7.42 5.372
    Velocity Y (km/s) 0.826 -3.084
    Velocity Z (km/s) -1.625 4.453

    Orbital Parameters 国际轨道数据源

    Parameter SHIYAN 21 (SY-21) STARLINK-37374
    Semimajor Axis (a) 6859.587 km 6840.815 km
    Eccentricity (e) 0.002564 0.000139
    Inclination (i) 35.9920° 53.1584°
    RAAN 31.4209° 305.1513°
    Perigee Argument 231.6589° 85.0321°
    Mean Anomaly (M) 128.1840° 275.0840°
    Apogee 499.039 km 463.629 km
    Perigee 463.861 km 461.727 km
    Orbit Epoch 2026-10-16T17:54:17+0000 2026-10-16T08:19:18+0000

    SHIYAN 21 (SY-21) & STARLINK-37374 Collision Probability (Pc) Trend

    SHIYAN 21 (SY-21) & STARLINK-37374 Collision Probability (Pc) TrendNot Available

    SHIYAN 21 (SY-21) & STARLINK-37374 Miss Distance (Miss Distance) Trend

    SHIYAN 21 (SY-21) & STARLINK-37374 Miss Distance (Miss Distance) TrendNot Available

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

    Object 1 Miss Distance TrendNot Available

    STARLINK-37374Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    SHIYAN 21 (SY-21)Collision Probability Trend

    Object 1 Probability TrendNot Available

    STARLINK-37374Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with SHIYAN 21 (SY-21)

    No nearby objects data