Conjunction Event Detail

    ✅
    Low Risk
    Low collision probability. Continue monitoring.
    2.243121E-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 64333
    NORAD ID 64333
    Object Type PAYLOAD
    Country
    US US

    Conjunction Constraints

    Parameter SHIYAN 21 (SY-21) STARLINK-34207
    Time of Closest Approach 2026-10-27T20:45:33+0000
    Collision Probability (Pc) 2.243121E-6
    Conjunction Distance (km) 1.749 km
    Relative Speed (km/s) 5.699 km/s
    Conjunction Risk Parameters R (Radial): 1.745 | I (In-track): -0.101 | C (Cross-track): 0.04
    Collision Risk Index (CRI) 0.42
    X Position (km) 5154.904 5156.257
    Position Y (km) 2522.553 2523.094
    Position Z (km) 3752.429 3753.394
    Velocity X (km/s) -4.186 -1.103
    Velocity Y (km/s) 6.16 6.879
    Velocity Z (km/s) 1.638 -3.1

    Orbital Parameters 国际轨道数据源

    Parameter SHIYAN 21 (SY-21) STARLINK-34207
    Semimajor Axis (a) 6859.160 km 6861.228 km
    Eccentricity (e) 0.002540 0.000394
    Inclination (i) 35.9931° 43.0035°
    RAAN 325.5705° 254.0815°
    Perigee Argument 320.7039° 297.4219°
    Mean Anomaly (M) 39.1852° 62.6232°
    Apogee 498.443 km 485.793 km
    Perigee 463.603 km 480.389 km
    Orbit Epoch 2026-10-27T06:20:58+0000 2026-10-27T06:05:03+0000

    SHIYAN 21 (SY-21) & STARLINK-34207 Collision Probability (Pc) Trend

    SHIYAN 21 (SY-21) & STARLINK-34207 Collision Probability (Pc) TrendNot Available

    SHIYAN 21 (SY-21) & STARLINK-34207 Miss Distance (Miss Distance) Trend

    SHIYAN 21 (SY-21) & STARLINK-34207 Miss Distance (Miss Distance) TrendNot Available

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

    Object 1 Miss Distance TrendNot Available

    STARLINK-34207Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    SHIYAN 21 (SY-21)Collision Probability Trend

    Object 1 Probability TrendNot Available

    STARLINK-34207Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with SHIYAN 21 (SY-21)

    No nearby objects data