Conjunction Event Detail

    ⚠
    High Risk
    High collision probability. Maneuver recommended for primary asset.
    1.154457E-4
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-10-27T03:09:32+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 58508
    NORAD ID 58508
    Object Type PAYLOAD
    Country
    US US

    Conjunction Constraints

    Parameter SHIYAN 21 (SY-21) STARLINK-31026
    Time of Closest Approach 2026-10-27T01:54:51+0000
    Collision Probability (Pc) 1.154457E-4
    Conjunction Distance (km) 0.517 km
    Relative Speed (km/s) 6.473 km/s
    Conjunction Risk Parameters R (Radial): -0.16 | I (In-track): -0.442 | C (Cross-track): 0.213
    Collision Risk Index (CRI) 0.76
    X Position (km) 5392.946 5392.984
    Position Y (km) 2310.334 2309.82
    Position Z (km) 3549.598 3549.564
    Velocity X (km/s) -4.007 -0.68
    Velocity Y (km/s) 6.13 6.802
    Velocity Z (km/s) 2.128 -3.384

    Orbital Parameters 国际轨道数据源

    Parameter SHIYAN 21 (SY-21) STARLINK-31026
    Semimajor Axis (a) 6859.190 km 6861.228 km
    Eccentricity (e) 0.002555 0.000135
    Inclination (i) 35.9931° 43.0025°
    RAAN 331.7063° 248.2342°
    Perigee Argument 312.3376° 272.5664°
    Mean Anomaly (M) 47.5195° 87.5034°
    Apogee 498.579 km 484.015 km
    Perigee 463.527 km 482.167 km
    Orbit Epoch 2026-10-26T06:49:50+0000 2026-10-26T06:30:51+0000

    SHIYAN 21 (SY-21) & STARLINK-31026 Collision Probability (Pc) Trend

    SHIYAN 21 (SY-21) & STARLINK-31026 Collision Probability (Pc) TrendNot Available

    SHIYAN 21 (SY-21) & STARLINK-31026 Miss Distance (Miss Distance) Trend

    SHIYAN 21 (SY-21) & STARLINK-31026 Miss Distance (Miss Distance) TrendNot Available

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

    Object 1 Miss Distance TrendNot Available

    STARLINK-31026Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    SHIYAN 21 (SY-21)Collision Probability Trend

    Object 1 Probability TrendNot Available

    STARLINK-31026Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with SHIYAN 21 (SY-21)

    No nearby objects data