Conjunction Event Detail

    ✅
    Low Risk
    Low collision probability. Continue monitoring.
    1.767707E-6
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-10-18T16:22:11+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 60272
    NORAD ID 60272
    Object Type PAYLOAD
    Country
    US US

    Conjunction Constraints

    Parameter SHIYAN 21 (SY-21) STARLINK-32128
    Time of Closest Approach 2026-10-19T03:35:24+0000
    Collision Probability (Pc) 1.767707E-6
    Conjunction Distance (km) 1.997 km
    Relative Speed (km/s) 6.796 km/s
    Conjunction Risk Parameters R (Radial): 0.961 | I (In-track): 1.571 | C (Cross-track): 0.773
    Collision Risk Index (CRI) 0.4
    X Position (km) 3074.822 3073.148
    Position Y (km) -4707.018 -4707.517
    Position Z (km) -3907.096 -3906.13
    Velocity X (km/s) 6.71 3.039
    Velocity Y (km/s) 3.49 5.533
    Velocity Z (km/s) 1.059 -4.282

    Orbital Parameters 国际轨道数据源

    Parameter SHIYAN 21 (SY-21) STARLINK-32128
    Semimajor Axis (a) 6859.540 km 6840.909 km
    Eccentricity (e) 0.002572 0.000116
    Inclination (i) 35.9923° 53.1594°
    RAAN 25.2863° 99.5480°
    Perigee Argument 240.0617° 80.5553°
    Mean Anomaly (M) 119.7562° 279.5580°
    Apogee 499.047 km 463.563 km
    Perigee 463.759 km 461.981 km
    Orbit Epoch 2026-10-17T17:25:32+0000 2026-10-17T11:31:47+0000

    SHIYAN 21 (SY-21) & STARLINK-32128 Collision Probability (Pc) Trend

    SHIYAN 21 (SY-21) & STARLINK-32128 Collision Probability (Pc) TrendNot Available

    SHIYAN 21 (SY-21) & STARLINK-32128 Miss Distance (Miss Distance) Trend

    SHIYAN 21 (SY-21) & STARLINK-32128 Miss Distance (Miss Distance) TrendNot Available

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

    Object 1 Miss Distance TrendNot Available

    STARLINK-32128Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    SHIYAN 21 (SY-21)Collision Probability Trend

    Object 1 Probability TrendNot Available

    STARLINK-32128Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with SHIYAN 21 (SY-21)

    No nearby objects data